| Re: [GMCnet] Isolator -- bypass? [message #326892 is a reply to message #326876] |
Fri, 08 December 2017 08:15   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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https://docs.google.com/viewer?url=http%3A%2F%2Fwww.gmcmotorhomemarketplace.com%2FGMC_Motorhome_Wiring_Diagrams.pdf
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, Troy-Bilt APU, etc., etc., etc.
www.gmcwipersetc.com
On Thu, Dec 7, 2017 at 10:58 PM, Ken Burton wrote:
> I looked at all of the pictures. I still do not see where the alternator
> wire is coming out of the wiring harness. The alternator wire usually comes
> out near the top horizontally from the vertical split loom tubing. I'll
> take your observation and assume The alternator wire is attached correctly.
>
>
> As far as the isolsator goes I see no advantage in attaching the house and
> the engine / chassis to the same isolator terminal. I would change it back
> when you install the new isolator. I would not worry about the 80 amp
> isolator and 100 amp alternator combination because that is 80 amps per
> port.
> That said a 100 or 125 amp isolator is the same price as an 80 so why not
> go for the heavier one. I saw a 3 battery isolator rated at 125. That
> might be a good solution if you are buying a new one. You do not have to
> use the 3rd port now but you could use it in the future.
>
> I'm working on a 78 GMC right now. It needs a new converter. I'm waiting
> for the owner to get a replacement Progressive Dynamics one. In the interim
> I attached a 12.5 amp switching type power supply and adjusted it to 13.2
> volts. Worked great. Then tonight I disconnected the 120 VAC before
> disconnecting the 12 volt side. The thing went up in smoke. My whole
> hangar now smells like an electrical fire. It really smoked.
>
> Good Luck. It sounds like you are on top of your problem(s).
>
> Ken B.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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