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Guest
Anonymous Poster
Oct 9, 2006, 5:53 PM
Post #1 of 5
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Is there a difference
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Is there a difference between a starter soleniod and a ignition relay switch on a 92 ford aerostar?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 9, 2006, 7:10 PM
Post #2 of 5
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Re: Is there a difference
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The starter solonoid should be the first thing the pos battery cable goes to and have one smaller wire that is from your ignition request. If that little wire is not empowered by the ignition there could be a fault with some sort of relay that has never happened to me in decades!
If the car has some theft control put on aftermarket that would be the likely problem as many can butcher the wiring, T
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Guest
Anonymous Poster
Oct 9, 2006, 7:22 PM
Post #3 of 5
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Re: Is there a difference
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the two different red wires goes on two different post on the soleniod, right?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 9, 2006, 8:24 PM
Post #4 of 5
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Re: Is there a difference
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Yes. Don't get too caught up in color for battery cables as some are replaced with just black but the clue is they are heavy gauge.
The concept of the solonoid is to remotely make a major electrical connection between the battery and the starter. The smaller gauge wire is from the ign and makes a solonoid magnetically trip to make the connection there instead of at the key itself. You can trip the solonoid with (fused) jumper wire to the little wire's place and it should make starter run.
Older solonoids had marks R and S which meant resistor and starter which is not needed anymore. If you hooked up the smaller wire to an R spot it won't start. There may still be some replacement solonoids out there with two spots but should be marked. The R & S thing was for cars with points which about ended in 1975 with few exceptions. An older new solonoid will still work if that happened.
You should be able to follow the current with a test light starting from battery to solonoid and power to the out cable when ign is set for start and on to the starter. If it doesn't do that you need to find where it stops, Keep us posted, T
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DanD
Veteran
/ Moderator
Oct 10, 2006, 3:59 AM
Post #5 of 5
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Re: Is there a difference
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Tom’s right on with the disruption of what they do just the terminology is a little off. I know I used to call the relay on the inner fender a solenoid as well, along with a lot of others and that’s probably why you’ve become confused.
A starter or for that matter any relay makes or breaks an electrical connection only. They are used so that a smaller/lower amperage switch can be used to turn on a higher amperage circuit.
A solenoid also makes and breaks an electrical connection along with mechanically moving something; in this case moving the starter drive gear in mesh with the ring gear of the engine’s flywheel.
Dan.
Canadian "EH"
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