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Tips
Tips

starter

MGB_80

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i think i fried my starter too...when i turn the key the starter dosn't engage or start the car...nothing happens...took the wires off and cleaned the connections and still nothing...do i need a new starter or can i rebuild this one?
 
Gah. Is the solenoid "alive"? Should have 12V+ at the big lug all the time. If you hear ~nothing~ (no 'click' from solenoid) you may have a bad iggy switch, bad solenoid, or the wiring in-between. Make sure you have trigger voltage from the iggy switch (the white/red wire, IIRC) when in the start position. You may need an assistant to turn the key while you check... and don't hold it in the start position for more than a second or two, it may still be passing current and you'll melt more "stuff"! You're going to need to go thru a process of elimination. The starters are stout, so don't just throw money at it, diagnose what's wrong.
 
Look at the wiring diagram for your car. Wiring diagrams are available at https://www.advanceautowire.com click on stock schematics.

Disconnect the white/brown wire from the starter. Have an assistant turn the ignition switch to the start position and see if you have twelve volts to the white/brown wire.

If you do have power, then the connector or the solenoid is suspect.

If you don't have power, trace the circuit back to the ignition switch.
 
now i am completely lost...cleaned the connections yesterday and tried to start the car...nothing...go down this evening and try to start the car just for the heck of it...it cranks right up with no hesitation...decided to pull the starter off and clean it up a little
 
cleaned it up put it back in went for a drive...come home let it sit for a few hours eat dinner go back down try to crank it...nothing take a hammer and tap the starter to see if it was stuck...nothing...is it a new ignition switch the solution?
 
Dunno, First need to identify the problem. Do you have a voltmeter/multimeter or test light?

If you do have the voltmeter(I would recommend it) check for voltage at the supply terminal(big one on the starter). should have battery voltage all the time. Then check for voltage on the signal terminal, the small terminal on the solenoid- That should be getting better than 11 volts when you try to start it.
If not trace back up the harness to the ignition switch. Why throw parts at it?

Little diagnosis and you can identify the failed part/circuit.
 
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It could be a five dollar relay, fifty cents worth the connectors, a couple of dollars worth the wiring, and/or one hundred fifty dollar ignition switch. You won't know until you isolate the problem.
Check and clean all connections. Use dielectric grease to prevent future corrosion. Don't forget the ground connections, especially the battery negative cable and the engine to body strap.
 
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