Fiero 3800 Swap Wiring Info

3800 s/c to Fiero Swap

IMPORTANT NOTES

Although all info here is believed correct for this application. However if you do use this
you do so at your own risk. The author is NOT responsible for any problems from the use of this material.
While every attempt has been made to be as simple as possible, all work should be done after any effects
of changes are understood and found to be the result desired.

Fiero C 203 Connector(Clear)
PIN # USE Wire Colour Description How to Modify

A upshift light TAN/BLK Grounding this wire causes upshift ind light to come on

B Fuel Pump Relay 12 v feed ORG/ORG BLK Pos feed for the fuel pump relay. Hot at all times Fuse 10A

C SES Light Circuit BRN/WHT Grounding causes 'Service Engine Soon' light to come on

D A/C Press Cycling Switch LT BLU Pos feed for A/C comp ctrl relay Hot when A/C on

E Oil Pressure Signal TAN Connect to oil press sender. 90 ohms at max pressure

F ECM +12 v PNK/BLK Pos feed for ECM. Hot in bulb test, run and start

G VSS high YEL VSS input to speedo. connect to magnetic vss or use converted signal from ECM

H ECM VSS Input from Speedo BRN buffered vss signal from Fiero speedo to ECM

J Injector bank #1 Fuse PNK/WHT PNK Pos feed for injector. Hot in run, bulb test, and start Fuse 5A

K Injector bank #2 fuse PNK/ PNK WHT Pos feed for injector. Hot in run, bulb test, and start Fuse 5A

L Fuel Pump Circuit TAN/WHT Pos side of fuel pump. Connect to COM terminal of Fuel Pump Relay

M Instrument Cluster Grd BLK/WHT to ground

N A/C Comp Ctrl Relay BLK/WHT Pos feed for A/C Fuse 25A

P TCC Over Ride PPL TCC brake Hot in run, test and start only when brake pedal is NOT depressed

R VSS low PPL/WHT VSS to speedo. Connect to Magnetic VSS or ground if using converter

NOTES:
* * *
F can be used for all switched 12 volt ECM inputs. Power comes from rust colour fusible link near battery.
* * *
J and K are used to power injectors as needed (per inj or per bank)

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PIN #	USE	Wire Colour	Description
A	upshift light	TAN/BLK	Grounding this wire causes upshift ind light to come on
B	Fuel Pump Relay 12 v feed	ORG/ORG BLK	Pos feed for the fuel pump relay. Hot at all times Fuse 10A
C	SES Light Circuit	BRN/WHT	Grounding causes 'Service Engine Soon' light to come on
D	A/C Press Cycling Switch	LT BLU	Pos feed for A/C comp ctrl relay Hot when A/C on
E	Oil Pressure Signal	TAN	Connect to oil press sender. 90 ohms at max pressure
F	ECM +12 v	PNK/BLK	Pos feed for ECM. Hot in bulb test, run and start
G	VSS high	YEL	VSS input to speedo. connect to magnetic vss or use converted signal from ECM
H	ECM VSS Input from Speedo	BRN	buffered vss signal from Fiero speedo to ECM
J	Injector bank #1 Fuse	PNK/WHT PNK	Pos feed for injector. Hot in run, bulb test, and start Fuse 5A
K	Injector bank #2 fuse	PNK/ PNK WHT	Pos feed for injector. Hot in run, bulb test, and start Fuse 5A
L	Fuel Pump Circuit	TAN/WHT	Pos side of fuel pump. Connect to COM terminal of Fuel Pump Relay
M	Instrument Cluster Grd	BLK/WHT	to ground
N	A/C Comp Ctrl Relay	BLK/WHT	Pos feed for A/C Fuse 25A
P	TCC Over Ride	PPL	TCC brake Hot in run, test and start only when brake pedal is NOT depressed
R	VSS low	PPL/WHT	VSS to speedo. Connect to Magnetic VSS or ground if using converter