The "yellow" wire coming from the alternator plug is showing 12 volts when I check it against the brown wire next to the yellow wire in the plug.
I have traced the red, yellow, and brown to the from of the hood area looking for an in-line fuse link or a voltage regulator box (Nothing found). All
three wires run to the hood area and after doing so, the red wire is piggy-backed with another red wire running to a blue box {mounted on the back
wall with GMC 706751 labeled) with one red wire going to a solenoid. The yellow wire coming from alternator runs to the hood area and is pig-tailed
with a red wire, which the red wire goes to one of the three post on top of the blue GMC 706751 box.
I did discover today, when I turn the house battery on, the red wire on the alternator is reading 12 volts. Turn house battery off and turn engine
battery on, no voltage reading on the red wire at alternator.
I am trying to find out of the blue GMC box is the problem or would it be a bad solenoid? I have attached a couple of pictures of the blue box and the
solenoid.
Any assistance will be greatly appreciated.
Samuel Ferguson
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Sent from my iPhone
Sent from my iPhone
Isolator box - No battery hooked up - Checked the continuity -
"center" lug to "right" lug -I show a 839 reading,
"center lug to "left" lug - showing zero
"left" lug to "right" lug - showing zero
Wiring 1st picture attached:
a red wire from alternator is going to "center" lug. This wire also pigtails and goes to a wire connector connecting to a green wire with a fuse
link, and then goes to the back of the fuse panel box.
Right lug (isolator) - Wire goes to left side of solenoid
Left lug - going to post under "vehicle battery post" sticker.
Solenoid - 2nd picture attached - The way it is wired now.
Left large post - Booster cable, Right post isolator
Left small post - ground
Right small post - wires going towards wiring harness
Right large post - + battery, starter, jumper to "vehicle battery" post
My problem -- When I start the vehicle, I check the output of the alternator on red wire coming from back, and I get 36.9 volts. I am told I should
only see .7 volts.
Any suggestions ????
Samuel