| Dash air fan [message #156997] |
Mon, 16 January 2012 21:00  |
Wander Inn
Messages: 100
Registered: January 2010
Location: Phoenix Az.
Karma: 0
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Senior Member |
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The only speed I have is high when set to max cooling,
no fan in any other setting. where do I start?
Mike
Mike & Chris Hughes
1977 Kingsley
Phoenix, Az.
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| Re: Dash air fan [message #157017 is a reply to message #156997] |
Tue, 17 January 2012 00:55  |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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Mike:
You have High Fan speed. That would tell me the switch, Fuse, Heater control, and wiring to them should be good because it is sending power to the High Speed fan relay. (Hooks the Battery/Alt directly to the fan) (The relay is pulling in and the Normally open points have continuity)
The Fan Ground and the wireing to the fan should also be good.
I would expect that your problem is one of Three things. So I would start with these three.
1 - Fan Relay, (Normally closed Contact points not working or corroded so bad they will not conduct electricity) Check for continuity between Terminal 1 and 2
2 - Wiring and-or Connectors between fan relay and Fan Resistor Network (Dark Blue 14 GA)
3 - Resistor Network (Screwed to side of heater box)
All of these items are also very suseptable to corrosion of the connectors You may even see some burning on a poor connector.
Best Regards
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Dash air fan [message #157039 is a reply to message #156997] |
Tue, 17 January 2012 09:08 |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
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Senior Member |
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Very good info, it will help me to trouble shoot mine 2! Low on the list, but now maybe it will bump up a notch!
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
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