| Re: [GMCnet] Isolator -- bypass? [message #326850 is a reply to message #326841] |
Thu, 07 December 2017 13:37   |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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Wow
The picture is a great help. I can not follow every wire in the picture but some are definitely missing or moved.
1. There appears to be a wire missing from the boost relay left side to the lower terminal of the isolator. This supplies the house side of things.
2. The wire from the vehicle positive to the isolator goes on the top terminal of the isolator. Yours has been moved to the bottom.
3. It appears that the wire from the alternator that is suppose to go to the center terminal of the isolator has been moved to the bottom terminal. This effectively bypasses the isolator for power from the alternator to the hose side, EXCEPT since the wire from the engine side has been moved to the bottom, so it is bypassing the isolator for power to the engine side.
4. The heavy wire tat goes from the boost solenoid to the rear for the Onan battery and house power circuits ids still installed and could / should be reused to supply alternator power to the house systems.
5. I see a CB mounted near the boost relay. It has probably a 10 ga. wire going somewhere. It is non-standard and I can not guess where it goes.
I am thinking that I would try to get the system back to OEM so we can more easily try to help you. When it is non-standard it becomes very difficult to remotely assist.
Again from what I can see, this Transmode appears to have come out of the factory wired the same as any GM upfitted GMC. So just about any GMC Chassis wiring diagram ought to work for you or I can send you an electronic copy of the one that I have
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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