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1996 GMC Safari - Limp Mode

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Old May 15, 2020 | 12:06 PM
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Thank you
What is the volt that I supposed to see on the fuse and on the pink wire ? 12V ?
Old May 16, 2020 | 12:04 AM
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Which wire?
Old May 16, 2020 | 12:10 AM
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You mean that I need to check 12V on the pink wire , right ?
If it will , what next ?
The problem cause from the ignition switch ?
Old May 16, 2020 | 05:45 AM
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First of all thank you guys for yours help .

Today , I checked all the fuses and the Trans connector with volt-meter (key was ON , not RUN) :

FUSES:
* "TRANS" - only 4V (when I run the engine it drop to 1.5V) .
* "TURN B/U" & "ILLUM"- no power at all , 0V .
* "BRAKE" & "HTR" & "CRUISE" - only 8-9V

TRANS CONNECTOR:
like in the attached photo , all the other pins shown 0V.

What do you think ?
please I need yours help


Old May 16, 2020 | 05:39 PM
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Did you buy this?
Old May 16, 2020 | 06:39 PM
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Yes, you are supposed to have 12v at the pink wire with ignition power on. If its less than 12v, or not 12v at all, check for 12v at the 10A TRANS fuse.
Old May 16, 2020 | 10:35 PM
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Yes , carfixer , I bought the car (Very low price) .
mike , if I looking the draw right , and like I holding the connector , the E pink wire is the one with 5V ? or 3.8-4V ?
I seen 2 pink wires , which one ?

in some guide I saw they take a wire and connect directly the pink wire with +12V from the battery and see what happen , what do you think ?

how can I check the ignition switch on the PCM ?
Where on the PCM the trans work conditions and the E pink wire connected ?
Old May 17, 2020 | 09:26 AM
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If your not sure which pin, use a multimeter to verify voltage at the 10 TRANS fuse. This fuse provides power to the trans. Please verify it has power when you turn the ignition on.
Old May 17, 2020 | 09:31 AM
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I did the test on TRANS fuse , in ON the volt was 3.8-4V . in RUN it drop to 1.5V .
Old May 17, 2020 | 10:04 AM
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Sounds like the ignition switch is not providing 12 Volts to the trans fuse. so there isn't 12 volts at the E terminal at the trans. On the back side of the trans connector (where the wires go in) there are small letters. Top row is A,B,C,AND D. Next row is E pink wire in a row by it self.I would send a picture but for some reason I have lost that ability.



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