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Idahome
Joined: Wed May 2nd, 2018
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So the sport trac is running but I had no oil pressure gauge so I went digging and did some more wiring real quick.
The sport trac wiring book I ordered (2002 trac) will be delivered today, I did not want to wait so I did it old school and researched this crap online and with my multi meter.
First up we needed a good ground for the starter relay ground.
In a 2002 trac with PATS E the stock pats system would ground the starter relay which then allows the key/ ignition switch to turn the starter.. in our truck here where we have piggybacked pats A so the V8 PCM is happy, we need to ground the wire for the starter relay.
The wire in question is dark blue with orange, it leaves pin 86 of the relay and travels up through the 02ST C110 plug at pin 28:
On the V8 side of things, plug C115 is orange/black wire which is the air suspension signal input to the PCM.. we do not need this since our Sport trac does not have air suspension.
So the orange with black wire is cut and tucked back into the pcm harness (small red rectangle), a short ground wire was added, to share the ground location near the computer (large red rectangles).
Next on to the oil pressure signal wire.
In a 2002 Sport trac the darg green with white (DG/W) oil pressure wire is routed through plug C139 where it then goes over to the v6 engine to the oil pressure sensor.
In a 2000 V8 Explorer the oil pressure sensor wire can be found at the C115 plug, pin 26.
So we need to remove the DG/W wire, circuit 253, from the C139 connector and run it up to the C110/115 plug and insert into pin 26. First I removed the wire with needed pin from the old donor truck harness and routed it along with our alternator batt light wire....
Here is plug C139 on the 02ST side of things, wire is cut and re routed up to the C110 plug:
Pin 26 on a 02ST is blank, so I simply had to drill a small hole, remove the red pin keeper and insert our new wire:
Its destination on the V8 side of things, pin 26 DG/W is the oil pressure sensor signal:
Now it runs right alongside the LG/R alternator to instrument cluster wire
Oh yeah and remember this wire that was left un hoooked from before? 02ST C110, pin 41, B/W:
Well its just the gas cap off signal wire, not needed...... So it will just be tucked into the harness and covered with the final wrap
Wala! Start the truck and now we have oil pressure........in fact now ALL GAUGES are working, I am sure I will have to do some fancy wiring to get the speedometer to be happy....but that comes after we drive her around a little. Now to bleed the power steering and bring the trans fluid up to level....
stay tuned!
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks