 auxillary heating fan wiring question, and the cockpit switch for the heater |
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| brant |
 Nov 21 2006, 12:17 PM
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914 Wizard  Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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Hey gang...
is my memory on this correct? does the heather lever/fan switch only have one electrical wire to it? is that a ground wire or a current flowing wire? (it must be hot since its identified in the current diagrams) I'm trying to trouble shoot why my auxillary heater doesn't work and want to understand how that switch works. when the switch is open/on.. does it send power to the engine compartment and regulator board? how does the switch work if it is only a single wire? or does it then send a ground signal to the back instead? thanks for everyone's time brant |
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| Dave_Darling |
Nov 21 2006, 01:06 PM
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914 Idiot Group: Members Posts: 14,992 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Everything is normal. When you put a test light on it, you are connecting the light from a wire that has power on it to a ground--so it glows. This lets enough current through that it "trips" the fan relay, which closes and sends power to the fan.
The way the switch works is: When you pull the lever all the way up, the switch grounds the wire that is plugged into it. This causes current to flow through the fan relay, which then sends power to the fan. So there is some power on that wire all the time--or possibly only while the ignition switch is on. Sounds like you just have to plug the wire into your switch and it should work... --DD |
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| SirAndy |
Nov 21 2006, 01:14 PM
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Resident German Group: Admin Posts: 41,693 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Dave_Darling @ Nov 21 2006, 11:06 AM)  Everything is normal. When you put a test light on it, you are connecting the light from a wire that has power on it to a ground--so it glows. This lets enough current through that it "trips" the fan relay, which closes and sends power to the fan. The way the switch works is: When you pull the lever all the way up, the switch grounds the wire that is plugged into it. This causes current to flow through the fan relay, which then sends power to the fan. So there is some power on that wire all the time--or possibly only while the ignition switch is on. Sounds like you just have to plug the wire into your switch and it should work... --DD (IMG:style_emoticons/default/agree.gif) dave is right. that "ground" wire always has current on it! putting a tester lamp on it will ground it out and make the fan run ... (IMG:style_emoticons/default/smile.gif) Andy |
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Posts in this topic
brant auxillary heating fan wiring question Nov 21 2006, 12:17 PM
ptravnic The lever connects the ground. The positive is in... Nov 21 2006, 12:28 PM brant Ok...
then I definitely have a problem
when I p... Nov 21 2006, 12:36 PM Travis Neff I definately think that is wrong. Eliminate the f... Nov 21 2006, 12:46 PM
SirAndy |
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