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Old 04-10-2012, 05:09 PM   #1 (permalink)
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Question need wiring experts

i have a 97 1/2 ton suburban 4x4 i installed a 3/4 ton front end from a 91 gmc aside from the obvious problems like it doesn't exactly bolt right in my current issue is figuring out how to adapt the wiring for the acuator and the 4wd indicator i managed to find a diagram for the suburban itself but could not get one for the gmc the suburbans harness has 4 wires that all plug directly into the acuatorthey are as follows:

grey w/ blk stripe

blk w/ wht stripe (when used as a groung it seems to give a .2 volt higher reading than the other two non pos wires)

blk

brn (pos all the time with key on)

the front end has 5 wires two going into the acuator and 3 into the housing next to the acuator they are as follows:

acuator:

lt blue (12 guage)

blk (16 guage)

housing:

brn (12 guage)

white (16 guage)

purple (16 guage)

i am a self admitted wiring idiot but i know there are lots of people here that know this stuff or can figure it out i have tried several different variations with the wires and succeeded in getting the acuator to engage and the 4wd indicator lights to come on but not the way they are supposed to . they would not turn off/or disengage when shifted into 2wd so if someone could please help i would appreciate it
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Old 04-10-2012, 05:52 PM   #2 (permalink)
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Does this help?

electric 4wd
http://www.diakom.ru/CAR/GMC/1997/Pi...RAMS/16281.pdf

the rest of them:
http://www.diakom.ru/CAR/GMC/1997/Pi...NG%20DIAGRAMS/

Try wiring the two wires going to the "front axle switch" together when you put it in 4wd?
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Old 04-10-2012, 06:53 PM   #3 (permalink)
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Angry

okay so by trial and error ive figured out that front axle blk to vehichle brown and axle blue to vehichle grey/wht stripe makes the actuator work like its supposed to but i still cant get the indicator lights workin right
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Old 04-10-2012, 07:09 PM   #4 (permalink)
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Quote:
Originally Posted by 88mitsu View Post
Does this help?

electric 4wd
http://www.diakom.ru/CAR/GMC/1997/Pi...RAMS/16281.pdf

the rest of them:
http://www.diakom.ru/CAR/GMC/1997/Pi...NG%20DIAGRAMS/

Try wiring the two wires going to the "front axle switch" together when you put it in 4wd?
thanks for the diagrams but i already have those ones i cant find the ones for the 91 gmc 2500 pickup and i got the actuator working correctly but the indicator lights still make no sense
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Old 04-11-2012, 08:57 AM   #5 (permalink)
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For some reason I though you were talking about a solid axle front end and the transfer case wasn't shifting into 4wd. I can get the diagrams this afternoon.
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Old 04-11-2012, 09:43 AM   #6 (permalink)
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For some reason I though you were talking about a solid axle front end and the transfer case wasn't shifting into 4wd. I can get the diagrams this afternoon.
thanks ill check back later
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Old 04-11-2012, 10:26 AM   #7 (permalink)
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Shopkey doesn't have transfer case diagrams for a 91 or 92, but I did find them for a 93.
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Old 04-12-2012, 06:18 PM   #8 (permalink)
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Shopkey doesn't have transfer case diagrams for a 91 or 92, but I did find them for a 93.
thanks that may help ill let you know
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