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Unread 11-11-2012, 12:15 PM   #1
FamousJerry
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HEI Relay Question

If by some chance i wired the switched power and ground backwards would that keep the relay from turning off? I can start my jeep but turn off the ignition and its still running .

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Unread 11-11-2012, 01:11 PM   #2
CSP
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No it shouldn't. Either terminal could be for the ground or switched power as it's really just a switch within the relat and there isn't any polarity involved.
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Unread 11-11-2012, 04:11 PM   #3
FamousJerry
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Well I wired it as I found on here red with white tracer for the trigger power and it starts fine. Just can't shut it off.

Not sure what I did wrong.
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Unread 11-11-2012, 04:14 PM   #4
skizriz
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Had that happen when I wired my starter solenoid backwards one time.
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Unread 11-11-2012, 04:18 PM   #5
brownbagg
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why you got a relay on the hei. just wire it straight from the key? that a question not a insult
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Unread 11-11-2012, 07:43 PM   #6
hutch1200
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I was curious about the relay also. I'm going HEI and want to do it right. I went nuts w/grounding everything. And have a "relay bank". Never thought of using it though.
"Relays are your friend"..someone told me.
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Unread 11-12-2012, 07:33 AM   #7
CSP
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A relay is used to avoid voltage drop.
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Unread 11-12-2012, 09:55 AM   #8
FamousJerry
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its strange that the only thing that really changed it the relay to activate the power and i cant turn it off with the key. I pull the redwire with white tracer and it will turn off. Time to get the test light out and see what the heck i did wrong. But on a side note, runs even smoother than it did before and a bit peppier that before.
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Unread 11-12-2012, 10:46 AM   #9
CSP
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You need to check the wire triggering the relay and be sure that it has no power with the key off.
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Unread 11-13-2012, 08:19 PM   #10
hutch1200
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CSP & skizriz: blank slate, would you use a relay here? Or will I be going overboard? How about inline fuse? It didn't have one stock, but WE all want better, no?
Or just follow the directions. You know, those silly papers that they put in all kinds of boxes of stuff you buy.
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Unread 11-13-2012, 09:30 PM   #11
CJ258
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I just came off my starter relay. Haven't had a problem.
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Unread 11-13-2012, 11:40 PM   #12
BagusJeep
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You can come off the starter relay (solenoid) but when AMC did that they used a fusible link. If you are going to power off that connection then it will get good clean battery voltage BUT you should put some harness protection in or you could put the entire battery content through a wire to ground and that is how modified CJs burn to the ground.
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Unread 11-14-2012, 06:03 AM   #13
swilliford
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I had the same problem with my 76' after an HEI upgrade. Any power, no matter how little will keep the relay open. After numerous problems (with the relay I would have to crank the motor 2 or 3 times before starting) I decided to do away with the relay and put in a 30 amp toggle switch. Its not traditional but works a lot better, As soon as I turn the key the motor fires up.
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Unread 11-14-2012, 10:28 AM   #14
FamousJerry
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my motor fires right up, just cant shut it off after driving. And the trigger wire is not hot when the ignition is off, so im more perplexed now.
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Unread 11-14-2012, 10:32 AM   #15
CSP
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Perhaps you have a bad relay that has the contacts sticking.
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