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Old Apr 30, 2010 | 05:10 PM
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I replaced the relay and the resistor. I tried an old blower switch but no luck. If I play with both switches I can get 3rd speed but not high. I always have low speed working. Is there an in line fuse? Is there away to check the switches. Can it be something else???

HELP
Carl 79 L82
Thanks
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Old Apr 30, 2010 | 05:26 PM
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I'm in the same boat, I've only got low. Haven't had time to look at it yet.
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Old Apr 30, 2010 | 09:46 PM
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Not sure about your year but my '73 has an inline fues located near the horn relay. I think the wire is a large orange one.
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Old May 1, 2010 | 01:48 AM
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:
Originally Posted by chvet73
Not sure about your year but my '73 has an inline fues located near the horn relay. I think the wire is a large orange one.
Good call on the in line fuse......my 71 is over by the horn relay vary close to the brake master cly........my fuse holder was a mess so I just
cut it out and put in a new one.
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Old May 1, 2010 | 06:28 AM
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Its possible it is a fuse. From my experience, it is more probable that it is the fan relay. The points on these seem to deteriorate with use, leaving you with only the default low speed
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Old May 1, 2010 | 07:09 AM
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Originally Posted by Rotonda
Its possible it is a fuse. From my experience, it is more probable that it is the fan relay. The points on these seem to deteriorate with use, leaving you with only the default low speed
How do I check that? Is that the same relay mounted on the wall, a little above the resistor? I replaced both of them(resistor & relay)! I still have not found an inline fuse. Not sure there is one on a 79
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Old May 1, 2010 | 07:56 AM
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Originally Posted by Carl79
How do I check that? Is that the same relay mounted on the wall, a little above the resistor? I replaced both of them(resistor & relay)! I still have not found an inline fuse. Not sure there is one on a 79
How do I go about checking the switch plug? In other words, I want to check for continuity to the plug harness at the switch. I'm stumped, I'm overlooking something but don't know what!
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Old May 1, 2010 | 09:30 AM
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http://www.nrjvette.com/johdotukset/...tte%201979.pdf
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Old May 1, 2010 | 10:03 AM
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All great suggestions, but still need help.
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Old May 1, 2010 | 10:15 AM
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On a/c cars there should be an inline fuse between the wiper motor and the fan relay alongside the main engine harness.
It starts a 10ga red wire and comes out the fuse orange.
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Old May 1, 2010 | 04:21 PM
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Originally Posted by noonie
On a/c cars there should be an inline fuse between the wiper motor and the fan relay alongside the main engine harness.
It starts a 10ga red wire and comes out the fuse orange.
Are we absolutely sure about an in line fuse associated with the blower on a 79 L82 with air, cause I can't find one !!!!
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Old May 1, 2010 | 07:57 PM
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I just looked close at the diagram I linked to-- it sucks! No indication that I saw of a hi-blow relay, and I KNOW there's one in that circuit.

track the orange wire back from the relay.. There will either be a fusible link in there or a fuse.
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Old May 1, 2010 | 11:37 PM
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Originally Posted by TimAT
I just looked close at the diagram I linked to-- it sucks! No indication that I saw of a hi-blow relay, and I KNOW there's one in that circuit.

track the orange wire back from the relay.. There will either be a fusible link in there or a fuse.
I'm still looking. I agree about the wiring schematic !!! But i remain still stumped.....
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Old May 2, 2010 | 09:25 AM
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I think that circuit is the same on 79 to 82

maybe this will help
Check the ground for the relay, it gets messed up on a starter change sometimes, same with the blower ground. The Or wire turns on the relay, the power for the blower on HI is the Red one on the relay, it comes up from the fuse link on the starter. There is a connector on the main harness right behind the passenger head that burns pins sometimes too, you could be losing the ground or the power there

Last edited by SIXFOOTER; May 2, 2010 at 09:28 AM.
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Old May 6, 2010 | 08:29 AM
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Originally Posted by SIXFOOTER
I think that circuit is the same on 79 to 82

maybe this will help
Check the ground for the relay, it gets messed up on a starter change sometimes, same with the blower ground. The Or wire turns on the relay, the power for the blower on HI is the Red one on the relay, it comes up from the fuse link on the starter. There is a connector on the main harness right behind the passenger head that burns pins sometimes too, you could be losing the ground or the power there
Hey guys,
I still need help !!!
I have power on the red wire from the relay. but don't know how to check any thing else. At least I know I got power to or after the relay.Now what????
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