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Registered
Join Date: Nov 2003
Location: Marietta, GA (Atlanta)
Posts: 873
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Quote:
Originally Posted by shadowjack1
Yes I do get 12 v (11.85 v now) I'm thinking that the relay is faulty and not sending enough voltage to run the motor. If I had a bad ground, the plug at the fan would not see 12v.
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Not necessarily, it's an amperage thing. If the ground is not solid you can get the voltage reading, but it may not provide enough current to run the motor. On the other hand it could be the same issue (corroded contact) at the relay too. The easiest (only) way to check the relay is to switch it out with a known good one to see. With the fan installed you can check the power circuit without the relay by pulling the relay and jumping with a wire between pins 7/8 (power from fuse) and pins 5/6 (to blower).
Relay schematic -The red line is just a correction to the diagram, not the suggested jumper location.
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