| Re: [GMCnet] Fan? [message #325981 is a reply to message #325978] |
Mon, 13 November 2017 19:26   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Art,
Quite aside from the question of whether you need a new blower motor,
there's the fact that the fan always runs when the key is on. That's a
design feature intended to keep the cockpit ventilated. Most of us figure
that after 40 years, the cockpit will ALWAYS be ventilated. So, many of us
make very simple modification that defeats the always-running blower: At
the left (driver's) side of the HVAC box under the hood, near the firewall
and the bottom of the box, there's a multi-wire connector which feeds the
blower speed resistor pack onto which it's plugged. One of the wires into
that connector is Yellow. If you do ONE of the following 3 tricks, you'll
defeat the run-with-ignition feature, leaving all other functions of the
blower switch unchanged: 1. Cut the yellow wire, 2. Remove that wire
from the connector, or 3. Unplug the connector, bend that pin over on the
mating male connector, then re-attach the removed connector. In simpler
words, disconnect that yellow wire.
For some later modification, that disconnected yellow wire may prove
useful, since it's always "hot" when the ignition is "On".
Ken H.
On Mon, Nov 13, 2017 at 7:57 PM, 1104agm wrote:
> I have 76 and the fan runs when ever the key is on. It sounds like the
> fan has gone bad. I would like to unhook the wire that connected to the
> fan when they is on. If I remember I need to disconnect the red wire but
> it has been a long time since I read how to disconnect the fan when the key
> is on. I was charging the battery and turned the key on and was surprise
> that the voltage was so low. Charger was set to 10 amps and the fan was
> dropping the voltage about 1.5 volts. So that is way to high so the fan
> needs to go. I need to rebuild the heater and the AC system if I am going
> to use the RV much. Looks like a lot of work.
>
> Had not planned to use the RV this year and now we are heading out to
> visit my wife uncle who’s cancer and is not doing to good. Tried to take
> the car but she wanted to go in the RV. So will be heading out in coupler
> days. I have done a few things on the RV but it really needs more tender
> loving care than it got this year. Next year I know I will be making my
> every other trip to up state NY. That one I look forward to as we stay
> next to lake and my wife favorite eating place. This time we will be going
> to another high school graduation.
>
> I started to grease the RV and could not get my grease gun to work.
> Everything is normal for me when I decided to pull out the RV. Last year
> it was a bad alternator that quit the day before I was getting ready to
> leave. A week earlier it was fine when I took the RV for a ride to check
> it out.
>
> Art
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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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