Wiring harness help
#1
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Location: waterport ny
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Wiring harness help
I'm looking for a little wiring harness help fellas. I've got a 1990 with an automatic transmission. Previous owner had all the wires going down to the transmission hacked and spliced. I'm working on cleaning this up but can't figure out which wires go to the speed sensor and transfer case. The speed sensor has a white/orange strip, and Brown with blue strip, which I can't find in the harness on the firewall. And there's a solid blue and solid black that are both bigger than the rest of the wires in the harness..?? I have the correct wires for the transmission plug.. But the others??
#2
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As I recall, a 1990 has a mechanical speedometer and no speed sensor.
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
#3
Registered User
As I recall, a 1990 has a mechanical speedometer and no speed sensor.
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
#4
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Location: waterport ny
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As I recall, a 1990 has a mechanical speedometer and no speed sensor.
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
According to the 1991 diagram, so perhaps different, the transfer case swithc is LG/BR and BK .
I'm not quite sure where you are breaking into the harness, but the solid blue and black sound like the main ignition circuit and ground . . .
Do you have a 1990 wiring diagram?
#5
Registered User
According to my '91 manual, white with orange is the speed sensor wire from the sensor, through the connector under the alternator regulator, to the bulkhead connector (pin #43), to the circuit board on the speedometer head. It calls for the other wire to be Black Light Blue, which joins a common ground for various sensors in the engine compartment (and does not go back through the bulkhead connector, I think it grounds on top of the intake manifold plate).
#6
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Tan/Orange and Black/light Blue got to the speed sensor. It is mounted on the transfer case, not the transmission.
Light Green/Brown and an unidentified goes to the transfer case switch.
White, Brown/Yellow, and Violet/Black goes to the backup and neutral safety switches connector on the side of the transmission.
This is the OEM wiring. If yours has been modified, good luck.
Light Green/Brown and an unidentified goes to the transfer case switch.
White, Brown/Yellow, and Violet/Black goes to the backup and neutral safety switches connector on the side of the transmission.
This is the OEM wiring. If yours has been modified, good luck.
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