Electric fan problems
#1
Electric fan problems
Ok so my 1988 Camaro has an electric fan on it and when the fan is plugged in the car will continue to run when the ignition is cut off and the key is removed. But if I unplug the fan the car will shut off fine. Anyone have any ideas here?
#2
Do you have a stock electric fan setup, or an aftermarket? Is it wired like factory, or hot-wired with a switch?
If you have it wired direct, or with a switch, the fan will act like a generator as it's free-spinning once the engine is shut off. That will feed power back to where the ignition can pick it up and make the engine run on. When you say "continue to run", are you meaning for a couple of few seconds? It shouldn't keep running.
If you have it wired direct, or with a switch, the fan will act like a generator as it's free-spinning once the engine is shut off. That will feed power back to where the ignition can pick it up and make the engine run on. When you say "continue to run", are you meaning for a couple of few seconds? It shouldn't keep running.
#3
It's a stock fan but it's run to the fuse box. I've tried it in different places in the fuse box and it does it in all of them. I had to just a hot wire under the hood and it did it then too. and it runs for like ten of fifteen seconds after turning the key off.
I had it wire up like this before with the other engine in it and it worked fine and never did that.
I had it wire up like this before with the other engine in it and it worked fine and never did that.
Last edited by camaro.s13; 05-25-2009 at 09:11 PM.
#4
Then test it. Turn the fan off first, even if you have to disconnect the wire, and wait till it stops spinning. Then turn the engine off. If the engine quits clean, you know it's a feedback issue.
Oh, and are you running with the exact same ignition setup that was with the other engine?
Oh, and are you running with the exact same ignition setup that was with the other engine?
#6
Then there's your problem...or solution. What you should try to do, is wire the fan using a relay, instead of having it be connected directly to a power source. As soon as power is switched off at the relay (ignition switched off), the hot line to the fan will be isolated from the rest of the car's electrical system. It's also safer and cleaner to use a relay. By "cleaner" I mean you can run a line directly from the battery to the relay to power the fan, which is the constant high amp draw. Just be sure to install an in-line fuse. The "other" power source activates the relay to turn the fan on, which is a low amp draw.
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