Starter/Solenoid Issue
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Freshman User
Joined: Apr 2007
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Starter/Solenoid Issue
I had to replace the starter in my 79 150, manual trans.
I went ahead and replaced the solenoid and voltage regulator while I was at it. Now I got a weird problem.
Turn key, nothing, no click on solenoid. I measured voltage. Battery 12V. Voltage to solenoid 10.5V. Thought that read 12V since it's only battery cable between them. Anyway, put key in start position, and the voltage at Solenoid drops to 2.5V. Figure that can't be right. Any ideas?
I went ahead and replaced the solenoid and voltage regulator while I was at it. Now I got a weird problem.
Turn key, nothing, no click on solenoid. I measured voltage. Battery 12V. Voltage to solenoid 10.5V. Thought that read 12V since it's only battery cable between them. Anyway, put key in start position, and the voltage at Solenoid drops to 2.5V. Figure that can't be right. Any ideas?
Fleet Mechanic
Joined: Aug 2007
Posts: 1,815
Likes: 248
From: Piney Woods of East Texas
If you are getting a voltage drop from the battery to the battery side of the solenoid, you have a bad connection or cable. Make sure you clean the terminals. New batteries post oxidizes and require cleaning. If you getting a voltage drop across the battery to starter, bad solenoid.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
I agree with Blue. You need to tighten your connections and make sure you cables are all in good shape. Instead of making your voltage measurements to ground, use your DC voltmeter to measure the drops across the different points. By measuring the voltage drops, it is easier to understand exactly where the circuit resistance exists.
As an example, if you measure across the solenoid with your meter leads while someone cranks the truck and you several volts dropped across the solenoid, then you know that there is resistance there.
Hope this helps,
As an example, if you measure across the solenoid with your meter leads while someone cranks the truck and you several volts dropped across the solenoid, then you know that there is resistance there.
Hope this helps,
Laughing Gas
Joined: Feb 2007
Posts: 821
Likes: 0
From: hohenwald, tn
check the wire on the s terminal. i have problems with it all the time. if mine doesn't start i twist it and she starts.
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Freshman User
Joined: Apr 2007
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I was leaning to replacing the cable from the battery. Figured I'd pick up another Solenoid while I was at the store. Can always return it.
Thanks for the input, I'll let you guys know.
Thanks for the input, I'll let you guys know.
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