I think I found my problem...I will get back with you if it doesn’t fix the problem.....I’m working on a 74-914. I’m not getting any power to the blower motor located inside the engine compartment. Looks like it has a two wires a brown (ground) and a green one (hot). What powers the green one? From what I can tell it is powered through the relay on the relay board. However, since the ground is supposed to be intermittent (actuates when the red cockpit lever is pulled up all the way) I have the problem where?
IIRC ............ the ground on the lever activates the relay on the relay board. It's the one at the back end. I call it #4. The brown wire comes from the body ground.
try tracing the blower motor power
http://www.914world.com/bbs2/index.php?showtopic=77603
this link shows the relay board and its 12--14 pin connectors.
Has it ever worked?
Another thing to check is the relay and relay socket itself. I'm seeing quite a few car with oxidation inside the female sockets for the relay.
pullup the carpet around the lever and remove the lever. make sure the ground wire is still connected to the lever. no wire, no ground. then you can put a meter on the blower motor harness at the plug and see if you have power out of the relay board.with no power out of the relay board or no ground, all the new blowers in the world wont rectify your problem. also basics, check all your fuses.
I had the same issue. I think injunmort is on the right track, as I went into the lever, didn't really find anything amiss, but when I put it back together it started working again.
Found the problem, loose wire on the heater control. Thanks again for all the help.
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