Starter Relay
Okay I checked the threads here, I purchased an almost useless Haynes shop manual.
New starter I can hear the fuel pump working Engine won't crank Where is the starter relay? Thanks Ralpj |
Might help knowing what year ?
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Can you hear the starter solenoid click? The only relay in the starter circuit is the VATS enable relay whick allows 12v from the crank contact on the ign sw to get to the starter solenoid.
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It's a 1990
Turn the key on and you can hear the fuel pump. The starter seems dead. No nothing from it. I can jump the starter and it cranks. I understand there is a relay just for the starter and that is what I can't find. Thanks again Ralph |
are you thinking of the solenoid? take a test light see it you have 12 volts on the s term of the solenoid while key is turned to crank. If you have 12 volts it is solenoid if not have to look futher.
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......I can jump the starter and it cranks.
Meaning it turns the engine over just fine. My manual says there is a " Starter Interrupt Relay" And that is what I'm looking for. Ralph |
You never stated what transmission you have.
The schematic shows the starter current path for a manual transmission. If you have an auto the current path goes thru the Park/neutral switch instead of the clutch safety switch. http://i135.photobucket.com/albums/q...90starter1.jpg http://i135.photobucket.com/albums/q.../90rrelay1.jpg |
That one did slip by.
I have the 6 speed. I'm simply looking for the physical location of the Clutch start switch aka " Starter Interrupt Relay" I know the clutch switch is working because the fuel pump works. Ralph |
Originally Posted by Ralphbf
(Post 1577948114)
......I can jump the starter and it cranks.
Meaning it turns the engine over just fine. My manual says there is a " Starter Interrupt Relay" And that is what I'm looking for. Ralph |
...... Sounds like a VATS issue ... starter enable relay is activated by the ECM after receiving clearance from the VATS module which , in turn , needs to "see" the proper resistance pellet on the ignition key in order to allow the car to start ... BTW : Vehicle Anti Theft System .......
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Originally Posted by Ralphbf
(Post 1577948753)
I'm simply looking for the physical location of the
Clutch start switch aka " Starter Interrupt Relay" It's a relay under the driver side of the dash cluster. The CCM grounds the primary of the relay coil to energize the relay.
Originally Posted by Ralphbf
(Post 1577948753)
I know the clutch switch is working because the fuel pump works.
When you turn the ignition key to start, 12 volts from the ignition switch goes to the starter enable relay. If the key pellet resistance value matches what the CCM was programmed for, the CCM will ground the primary coil of the starter enable relay. The relay closes and 12 volts passes thru it to the Clutch Safety switch. If the Clutch pedal is depressed, the 12 volts passes thru the switch to the Starter Solenoid which is a Purple wire. A defective Clutch Safety switch is a common problem. The contacts inside the switch can't handle the current. The part is no longer available. Some people bypass it. When you turn the ignition key to On, does the Security light go Out or does it stay On? If it stays on, the key pellet resistance is not being read properly by the CCM so the starter will not engage. You need to gain access to the starter enable relay. By taking some voltage measurements at the starter enable relay socket it will lead you to what the problem is. Remove the panel that contains the foot well lamp. You might also have to remove the carpet that covers a metal panel that is bolted under the steering column. This will give you access to the relay which is located under the front edge of the dash cluster. |
I don't believe it's the VAT system because the way I understand it it disables the fuel pump also.
Fuel pump is a working. So My hopes lay it the Clutch start switch aka " Starter Interrupt Relay" But I could not find it any where, now I know where to look. Thanks and I will keep the group updated. Ralph |
If the key pellet resistance value does not match what the CCM
was programmed for, the starter will be disabled and the computer will not pulse the injectors. The fuel pump will still operate. There is a starter enable relay and a clutch safety switch. They are two individual parts. |
The easy fix would be the Clutch start switch aka " Starter Interrupt Relay" ?
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Originally Posted by Ralphbf
(Post 1577949814)
I don't believe it's the VAT system because the way I understand it it disables the fuel pump also.
Fuel pump is a working. So My hopes lay it the Clutch start switch aka " Starter Interrupt Relay" But I could not find it any where, now I know where to look. Thanks and I will keep the group updated. Ralph The start enable relay is behind the, "breadbox" on the right side of the dash. Most VATS problems are due to a defective clutch safety switch (jump yours and try a crank) or the contacts in the ign lock fail to make connection to the key pellet. I have replaced the ign lock three times on my 87 vette which have new contacts and I have permanently bypassed my defective clutch safety switch, but even with 240k miles and driven every day, my start enable relay is original. If I were you, I'd forget about the relay and concentrate on the clutch safety switch and also measure the resistance with the key in the lock on the two wires from above the steering column that go to a 2 pin connector. Unplug the 2 wires and measure the resistance across them with the key inserted. It should measure the same as the pellet. |
It was the starter interupt relay.
What a PAIN. Thanks to all. Ralph |
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