Remote Solenoid Defective ??? - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

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post #1 of 11 (permalink) Old Jul 5th, 20, 5:33 PM Thread Starter
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Remote Solenoid Defective ???

Have a fairly new system that uses a remote start solenoid. Recently had a no crank issue which I mistakeny thought was due to the remote solenoid. Bought a new Motorcraft solenoid and installed but no fix.
So I figured out the problem but still have the new solenoid installed. Went to start the 69 and went to let go of thekey and starter kept cranking. Had to open the hood and pull the positive cable off the battery to stop the starter. Reinstalled the old remote solenoid and starter worked as it should.
Id say the new solenoid is defective as it wont unlatch once power is applied. Is there any other explanation for this action by the solenoid?
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post #2 of 11 (permalink) Old Jul 5th, 20, 8:07 PM
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Re: Remote Solenoid Defective ???

I think it's popular opinion today that a lot of products aren't made as well as they once were.

Is the solenoid still engaged even after it has been removed? I would put 12 volts to it and switch it just to appease my own curiosity.

In the end it really doesn't matter as you've corrected the problem, but I like to figure things out. Heck, depending on the cost (assuming you might return it) I might even cut it open (after some testing)just to see what's going on.

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post #3 of 11 (permalink) Old Jul 5th, 20, 10:39 PM
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Re: Remote Solenoid Defective ???

Quote:
Originally Posted by blm View Post
Have a fairly new system that uses a remote start solenoid. Recently had a no crank issue which I mistakenly thought was due to the remote solenoid. Bought a new Motorcraft solenoid and installed but no fix.
So I figured out the problem but still have the new solenoid installed. Went to start the 69 and went to let go of the key and starter kept cranking. Had to open the hood and pull the positive cable off the battery to stop the starter. Reinstalled the old remote solenoid and starter worked as it should.
Id say the new solenoid is defective as it wont unlatch once power is applied. Is there any other explanation for this action by the solenoid?
Maybe the solenoid is defective or maybe there was something holding it shut electrically. While this might not even be close to what happened with you but years ago an old neighbor wired up an electric cooling fan to the ignition circuit on his car and did not use a relay and when the fan was spinning and he shut the car off it ran for a little bit until the fan slowed down enough to where it could not produce enough power to keep the ignition system firing the motor. What was happening was the fan being sent power to it made it work but then when power was removed, it produced a limited amount of power backwards into the vehicles electrical system.

Who knows too that maybe the heavy amperage contacts inside welded themselves together and the return spring did not have enough oomph to separete the contacts.

Hopefully the place you got it from takes returns for refunds.

Jim

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post #4 of 11 (permalink) Old Jul 6th, 20, 7:56 PM
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Re: Remote Solenoid Defective ???

When tightening the main power cables on a remote solenoid, care must be taken so the terminals don’t spin. This mis-aligns the contacts on the inside and leads to solenoid failure. Maybe this is what happened to the new one.
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post #5 of 11 (permalink) Old Jul 7th, 20, 1:46 PM
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Re: Remote Solenoid Defective ???

Another thought is were the solenoids the same? Starter solenoids are similar in that they have the two big terminals for power to be switches but may be different in that some have two control terminals and some only have one terminal. The difference is the one control terminals solenoid is internally grounded where the two terminals is not. Depending on how it is wired I can see how the solenoid could stay energized after the key is returned to the run mode... Al
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post #6 of 11 (permalink) Old Jul 7th, 20, 3:46 PM
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Lightbulb Re: Remote Solenoid Defective ???

There are many different types of solenoids.

Sounds to me like it may not have been wired correctly for the type it was.

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post #7 of 11 (permalink) Old Jul 7th, 20, 5:21 PM
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Re: Remote Solenoid Defective ???

The availability of good GM gear driven starters (PMGR) with Permanent magnet motors has made the need for extra solenoids less and less as the years go by.I realize this is no help to your set-up right now but might get you to think about switching to a GM based mini-starter.Many members on TC have switched to this type starter and left their starting troubles behind.

https://www.dbelectrical.com/product...ong-bolts.html

I'm getting ready to put a newer set of headers on my SBC and will replace the starter at the same time (since it's easy to get to) with one of these.

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post #8 of 11 (permalink) Old Jul 7th, 20, 9:08 PM Thread Starter
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Re: Remote Solenoid Defective ???

Ok I’ll try to answer a few questions. The two solenoids are exactly the same. Aside from a nut and lock washer on one and a nut with a built in washer on the other they are indistinguishable.
Both solenoids were wired correctly and absolutely the same. So if I wired the one I suspect is defective incorrectly (which I didnt) then wouldn’t the other be wired incorrectly and fail to function correctly? It’s only three wires, power in, power out, and a jumper from the purple wire to tell it to activate. Kinda hard to screw that up.
I do have a mini starter. It’s a Powermaster brand.
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post #9 of 11 (permalink) Old Jul 7th, 20, 10:11 PM
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Re: Remote Solenoid Defective ???

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Originally Posted by blm View Post
Ok I’ll try to answer a few questions. The two solenoids are exactly the same. Aside from a nut and lock washer on one and a nut with a built in washer on the other they are indistinguishable.

Both solenoids were wired correctly and absolutely the same. So if I wired the one I suspect is defective incorrectly (which I didnt) then wouldn’t the other be wired incorrectly and fail to function correctly? It’s only three wires, power in, power out, and a jumper from the purple wire to tell it to activate. Kinda hard to screw that up.

I do have a mini starter. It’s a Powermaster brand.
Ok, so going back to the issue of " continuing to crank" when the key is released.

If your mini starter is a permanent magnet starter, which I believe all mini starters are. These starters actually generate electricity. That electricity is then backe fed through the battery cable to the purple crank wire and this keeps the remote solenoid energized.

When using a remote solenoid on a permanent magnet starter, it's necessary to use a relay on the purple crank wire to eliminate the back feed issue.

This is very common in LS world.



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post #10 of 11 (permalink) Old Jul 8th, 20, 6:53 AM Thread Starter
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Re: Remote Solenoid Defective ???

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Originally Posted by senna View Post

When using a remote solenoid on a permanent magnet starter, it's necessary to use a relay on the purple crank wire to eliminate the back feed issue.
Yes, I have it mounted on the firewall. Purple wire goes to the relay. On the in side of the relay the purple wire splits and the split leg goes to the S terminal on the remote solenoid to trigger the solenoid. The out side of the purple wire on the relay goes to the solenoid on the starter.
Maybe I should have mentioned that this is part of the Mad Electrical “start em up” kit. It is well thought out and has very detailed installation and wiring instructions.
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post #11 of 11 (permalink) Old Jul 8th, 20, 9:51 AM
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Re: Remote Solenoid Defective ???

Interesting, sounds very similar to what I am doing. I use a Madd Electric as well and.

I'm just completing mine now so no input on it's success.

Maybe you are back to the original thought of a bad solenoid. Have you tested it any?

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