Electrics Miscellaneous

Corrosion Proofing
Removing Chimaera Headlamps
Removing Griffith Headlamps
Headlamp Wiring Fault
Griffith Headlamp Bulbs
Blue Headlamps
Griffith Driving Lamps
Courtesy Light and Battery Drain
Footwell Light
Mucky Horn Slipring
Intermittent Wipe & Park Problems
Indicators
Rear Speakers and Air Vents
Radio Reception
Ice Detector
Mirror Control Unit Location

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See Doors for door mirrors

Corrosion Proofing

Sprint Jun 98
Whilst working on a friend's Mazda recently, I noticed that the electrical sockets on the lighting circuits were greased.

Having various friends with TVRs as well as my own, a rucurring problem has been corrosion of the electrical terminals in the engine bay, especially low down at the front for the lighting. With this in mind I visited a local electronics component supplier and purchased "Electrolube" for �1.40 and have coated all the connector terminals. Hopefully this will solve one lot of problems.

Available from Maplins, tel. 0172 554000, part no. FM80B.
Neil Lepley

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Removing Chimaera Headlamps

April 97
I've managed to remove the headlight surrounds - they are just bolted on with 2 x 10mm nuts at the bottom. One of my headlights has got a hole in (as well as a resident fly) and once the surround was removed, the headlight pulled through the sealant quite easily. I ordered another from Christopher Neil & they said they would chuck in some more sealant!
Nic Conway

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Removing Griffith Headlamps

Letter Oct 97
Noticed you had a query about headlight removal on your homepage. Here's what I know.

The Griffith headlight pods appear to be sealed into the car at manufacture. However, it is possible to access the interior arrangement for bulb replacement and alignment. To access the headlight fixtures, you will need a jack, wheel brace, stanley knife, phillips screwdriver, a tube of black mastic (can get this from any hardware outlet), masking tape and a torch.

- Loosen wheel nuts on front wheel behind offfending headlight

- Jack up car and remove wheel

- Look inside wheel arch at the back of the headlight for a small inspection hatch sealed with black rubber

- Run knife around the edge of the rubber too break seal

- Unscrew 4 screws and lever the fibreglass hatch cover off

- This will reveal the rear of the headlightt assembly

- The rubber boot can be removed to access tthe bulb fixings, remove the cable connector first.

Note the three wing nuts. These can be used to alter the alignment of the headlight. This is a trial and error game, best done at dusk in front of a barn door [is this a TVR special tool?]. Position the car about 10-20 yards from the door, switch on the dipped lights and fiddle with the wing nuts until the alignment appears correct. There are legal guidelines for the height and spread of dipped headlights - check local garage for details.

If the pod has come loose within the body of the Griffith nose, check the single nut at the bottom of the fixing strut. A strip of aluminium has been fashioned (in typical TVR style) to hold the whole pod arrangement in place. This strip can be found directly below the inspection boot at the rear of the headlight. The headlight pod is also kept in postion by the sealant between itself and the recess in the nose.

If the sealant has perished or the pod has shaken loose it will need re-sealing. This is a time consuming job (about 45 mins per light), but is ncessary if the pod is moving around as headlight re-alignment is impossible otherwise.

Loosten the single nut mentioned above to allow greater movement of the pod and scrape out the existing sealant. Use something soft (like the handle of an artists paint brush) so you don't scratch the paintwork or the pod. It is better to remove all the old sealant as it is not easy to merge old with new. Re-position the pod by hand and tighten the nut at the rear to hold the unit in place. Unless your arms are 5 foot long you might seek some assistance here!

Tear off strips of masking tape and work your way around the outside edge of the pod recess. Position each strip of tape to cover all of the paintwork up to the lip of the hole. Then repeat the exercise with a line of masking tape on the edge of the pod (about 3-4mm from the other circle of tape). Ensure the pod hasn't moved since you set the position correctly last, then load the mastic tube into one of those gun frames that can be found on the shelf below at B&Q.

Shape the nossle of the mastic tube to offer the smallest aperture and fill the gap between the two circles of tape. Try to get as much into the gap as possible as the sealant is used to hold the pod in place, not to just act as a water seal. When finished, run your finger lightly around the whole edge to give a smooth finish. Leave for 1-2 hours, then peel off the tape. To finish, replace the inspection hatch and re-seal the edge of this with sealant also.
Mark Elliott

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Headlamp Wiring Fault

Letter Aug 97
. . . The night time problem relates to the lights. The problem is:

1. On main beam the grille mounted main beam lights only are on.

2. On dipped position the main beam and faired in driving lights are on. It is not possible to just have only the dipped beam on.

3. With the side lights only on, and pull the headlamp flash stalk, with the ignition off, the ignition lights and gauges come on as long as the flash position is maintained!

I had suspected an earth fault for the front lights and found a bunch of earth wires grounded to one of the steering rack mounting bolts. I checked the earth with an ohm meter betweem the chassis and piercing the insulation of one of the earth wires with a probe needle. resitance was less than 10 ohms, so I assume no problem there. I have also removed and refitted the relays for the headlights, the terminals all seemed free of corrosion etc.

I have noticed one other thing, when the lights are flashed, with all light switches off, the main beam blue dash indicator lamp does light up. However when the lights are on, it does not work in either dippped or main beam stalk positions.

All other lights and electrics are working fine, which I am sure is a novelty in itself! I suspect backfeeding due to a poor earth as the most likely cause but do not know where to look next. I have checked the resitance between the neg terminal of the battery and the chassis, again less than 10 ohms. Could it be a faulty indicator/light stalk switch assy? Could it be that one of the relays is faulty or has been replaced with an incorrect type? I do not really want to contemplate a loom fault/damage, as it is so inaccessible!
Peter Faulkner (1992 4.3 Griffith)

Peter,
I am utterly USELESS with electrics! However, I do have a slightly spotty photocopy of the 1992 Griff 4.0/4.3 wiring diagram which I can send you if it helps. Failing that, if you need to test particular circuits I can look them up for you and email a description of the route and colours. The diagram is a bit schematic and looks sort of vague about relays. I believe the whole column assembly is from Vauxhall, so maybe one of their dealers could give you some help on fault finding in that area.

If it's any help at this stage, the heater fans, horn, radiator fans, washer pump and all front lights seem to share the same earthing point. Main beam wiring is:

  Brown feed from dashboard panel pin 79 to pin 56 on main/dip switch.
  Brown/red feed from dashboard panel pin 28 to:
     pin 56b (I think - photocopy is bad here) on dip switch and
     pin 86n on fuse panel block G, which goes to a diode then brown/white wires to:
        pin 85m on fuseboard block A and
        pin 30 on dashboard panel and
        pin 56a (I think) on dip switch
  Brown/white wires from pin 87m on fuseboard block A to driving lamps.

Green wire from dip switch pin 30 goes to wash/wipe switch and to fuseboard block M whereyou will also find a red to the ignition switch, a green to the brake light switch, a purple to block A and the courtesy light and (nearby if not on it) browns from the battery.
Peter Beech

(not every story has a neat ending - I've no idea how Peter got on with this)

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Griffith Headlamp Bulbs

Internet Mailing List Apr 97
To get to the headlamp bulb under the Griff perspex cover, first Jack the car up and take the front wheel off. You can probably access the unit without doing this but it is a lot easier with the wheel out of the way. There is an inspection hatch in front of the wheel which is (usually) held in place by some self tappers and loads of sealant. Undo the screws and you can remove the panel and get access to the headlamp unit. The bulb is held in place by a spring clip and a rubber gaiter/boot.

I would strongly advice using some sealent when replacing the panel to make sure that no water or spray from the wheel can get into the compartment.
Steve Heath

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Blue Headlamps

Internet Mailing List Jun 98
Related to a scam in the US, remembering seeing in alt.autos.tech a few months ago. Hope it's of interest...

[I've edited this to reduce the length: PB]

Various companies are selling halogen bulbs that have a coating that makes them light up with a bluish color. Drivers have been confused by marketing claims which falsely equate their performance with the very expensive arc-discharge headlamps found on top-line luxury cars.

Genuine arc-discharge headlamps run with a very purplish-white character that will remind you exactly of the color of the electronic flash on your camera. That is because the same technology is at work. HiD headlamps are legal because they're not actually blue, they just appear more blue than the halogen lamps surrounding them.

The tinted blue bulbs give headlamps a bizarre turquoise-blue-green coloring.

These blue bulbs have a filter coating on them that allows only the blue frequencies through the filter. Because very little light is produced by a halogen bulb in this range in the first place, it is only this very small amount that ever reaches the road.

Headlamp illumination of the roadway and road hazards is dramatically reduced.

Glare for oncoming traffic is sharply increased.

Because blue is the shortest wavelength of visible light, it scatters the most readily. When it strikes water (rain, fog, snow) it scatters in all directions and makes on-road vision very difficult.

In no case are blue-tinted bulbs legal for use in any European, Canadian or American headlamp on any non-emergency vehicle.

There are other new headlamp bulbs on the market, meant for use in regular halogen headlamp assemblies. They produce yellow-tinted white light rather than plain white light. These bulbs do not have the dangerous effects of the blue bulbs discussed above, and have been proven (and approved) to improve bad-weather visibility and reduce glare. They look unusual, but they are actually OK.
Daniel Stern (Automotive Lighting Specialist)

Danny-Luhde-Thompson

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Griffith Driving Lamps

Internet Mailing List
I've just discovered that the cracked Driving Lamp I've had on my Griff for two years has finally given up the ghost and has now fallen to bits. Does anyone know where I can get a lens for this lamp (Cibie make them), because I've been quoted £61.50 + vat + p&p for the whole unit. The existing unit still works, so I don't see any point in completely replacing it unless I have to.
Sean Lennon

Internet Mailing List
The lights are the same as those used as driving lights on the E30 series BMW (the old shape 318 etc.). Strangely the local BMW dealer is only asking £35 and not £78 as Kerridges are.
Steve Marriot

Letter Sep 96
. . . Having heard of the prices quoted for replacement driving lights on Griffs I have fitted mine with a pair of rather neat plastic protectors from Carnoisseur (01582 471700) £21.95 a pair, part number 3100830. These are unobtrusive, removable for cleaning and don't interfere with the light output.
Simon Cockle

Letter Sep 97
Having smashed four headlights in under two years, I was keen to get hold of the protective covers mentioned. I contacted the company mentioned [above] and the covers arrived the next day. As both headlights were cracked, I tried to get hold of the suggested BMW substitutes. However, these don't fit mine. My car is now 22 months old by the way. I seem to have "Cibie SC" lights fitted. The number on the glass is 0488047. It also says E2 & 30, & HR. I've tried to contact Cibie UK, but have had no luck. Has anyone any ideas? By the way I'm not being tight, just resentful at having to pay through the nose. Given the vulnerable position of these lights, I reckon TVR should fit protectors as standard.
Tony Miller

Internet Mailing List Oct 96
When I switch to main beam on the Griff the driving lamps come on but the main headlamps stay on dip, is this normal ? If so why, and is it possible to change this so the main headlamps give main beam also ?
David Donnan

Internet Mailing List Oct 96
As far as I know the driving lights are the main beam on the Griff. When I got mine the garage said that since the lights are faired in they would get too hot on main beam and hence the driving lights. The chim' and cerb' lights are not faired in, hence no supplemental lamps.
Andrew

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Courtesy Light and Battery Drain

Sep 96
Even when the courtesy lights are switched off, if a door is left open the relay coil still operates resulting in a continuous drain. Over a several days this can be enough to drain the battery.

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Footwell Light

Internet Mailing List Apr 97
Grovel in the passenger footwell and just under the glove box compartment and near the ventilation hole is a flat surface. It's close to the transmission tunnel. That's where my light is.

It's connected to the interior light circuit. In my case, it was switched off so that was why I didn't notice it. Maybe it was an optional extra... mne's a late '95 Griff... if that makes any difference.
Steve Heath

Internet Mailing List Apr 97
There is a light in my [K Reg Giffith] footwell - same place. I discovered it about a year after getting the car - not in the manual at all(no surprise there). My passenger was grovelling about trying to turn on the warm air (for what it's worth). It is useful 'cos you can then see the fuses - assuming you have some power.
Steve Marriott

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Mucky Horn Slipring

Aug 96
If your horn doesn't work in some steering wheel positions, the most likely cause is factory-applied dirt on the slip ring. Fortunately you can get at this in five minutes by removing a couple of screws in the steering column cowl, so it's worth looking at before bothering a dealer. The offending gook looks like fibreglass dust to me, polished into a nice non-conductive laquer after a few thousand miles.

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Intermittent Wipe & Park Problems

Aug 96
There is a relay in the Chimaera passenger footwell that controls wiper parking and intermittent wipe, and either may stop working work if the relay works loose. The one to look at is in the centre of the fuse panel (behind the carpet). It is a large relay and usually blue. The Owner's Handbook contains a fusbox/relay layout if in doubt.

If this does not fix the problem, the fault may be in the park switch on the wiper motor. This is located under the motor unit next to the multi-plug on the wiring harness and can be reached by taking off the motor bracket and twisting it upwards. The park switch is held on by a spring clip and is a standard Lucas part. The switch and the multi-plug are prone to corrosion, and an occassional squirt of WD40 should prevent this problem occurring.

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Indicators

Mar 97
Should you ever need to get at it, the flasher unit is not on the fuseboard/relay panel, but under the top of the dashboard.

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Rear Speakers and Air Vents

Internet Mailing List
I have noticed that quite a few Griffiths and Chimaeras have speakers mounted in the panel separating the boot from the passenger compartment. In most cases the speakers are where the two original air vents were. Is this a good idea? Perhaps they don't do anything anyway, but I am sure a speaker does not make a good air vent!
Steve Powell

Internet Mailing List
The reason for the air vents in the rear bulkhead of Griffs is to allow airflow through the car. Without them, when you turn the fan on to blow air in, the car gets pressurised, not much air comes in or goes out, and what does go out is forced out through the gaps at the tops of the windows and makes a whistling noise sometimes. That's why TVR put the vents there. They are slightly less conspicuous in the Chimaera, a slight protrusion of the leather on the upper lip of the bulkhead giving away the fact that vents are there. You can shove speakers in here, but then your airflow is disturbed and won't work well with the windows up. Fan never was any good anyway so I don't suppose it matters.

What I reckon you should do with regards to fitting a stereo is this. Get a custom made box for the boot that houses your 18-disc multichanger and 400W amp and doubles up as an acoustically tuned box for a couple of 15" subs. Then, up front, mount tweeters in the side pods of the doors (where the ashtrays are) and your midrangers in the doors. Simply port the acoustic box in the boot through one of the air vents (if you have a Griff) or bash a hole through the bulkhead and port it in if you have a Chimi. If you have a Cerb, you're lucky - you can take up the whole of the back seats for amps and subs too because they're damn all use for anything else!
Rupert Kent

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Radio Reception

Letter Sep 96
Given the levels of cabin noise on a Griffith 500 and the musical note of the engine I've always thought a stereo to be a rather unnecessary accessory. I presume TVR think the same so have never bothered to sort out how to fit them properly! There seem to be two basic problems - a very weak radio signal (due to a lack of a decent aerial) and an excess of electrical noise (due to inadequate supression and poor shielding given by the GRP bodyshell).

After numerous complaints to my dealer, they made a significant improvement by enhancing the earthing with heavy straps to the chassis and direct to the battery terminal. They also suggested fitting an aerial laying horizontally across the recess in the boot by the petrol cap. I baulked at this as they wanted £50 for correcting what I see as a basic design fault and opted instead to get a car audio specialist to check it out. So, a visit to Milton Keynes Car Alarm and Radio produced an amplified sceen aerial (Radiornobile) fitted not on the screen, but tucked away behind the dashboard. They also fitted a suppressor to the second live power feed as TVR see fit to only put one on the switched feed. This has fixed 95% of the problem and the remaining interference will probably succumb to libral application of suppressors to all fans, wiper motors and the alternator, but that will need a second visit. Meanwhile a big thanks to MK Alarms (01908220337) and a total bill of £20.
Simon Cockle

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Ice Detector

Internet Mailing List Dec 96
. . . Does anyone know where the ice detector sender unit is ?
David Donnan

Internet Mailing List Dec 96
Yes! Just shows how much I have been under the car already. It is a little 2-terminal device that looks like a ceramic capacitor attached at the end of a wiring harness, which I found hanging inside the left-front of the car near the front indicator lights. Its not attached to anything in particular but just hangs in the lower part of the bodyshell. If you put your head under the car from the front, and look around you should find it. I found the device by accident and was not really looking for it. I also don't know if it works because it never gets lower than 21 deg here, so its a superfluous feature for me!
Kenny Heng

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Mirror Control Unit Location

Internet mailing List Nov 98
I have an 8 week old Chimaera 500. While driving along an electronic control box fell between my legs! I have now found this is the door mirror control unit. It had two plastic straps covered in Velcro type hooks, they were pressed into a carpet off cut. The carpet had glue on the back an had obviously been stuck up somewhere behind the dash.

Talking to my dealer it seems this is a recent modification, the box used to be in the drivers door. This caused problems with water getting into the unit, so TVR moved it inside the cabin. The dealer has spoken to the factory and it seems the carpet idea isn't working very well. My dealer has now built a bracket for the unit.
Stephen Sutton

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