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Check for power on the small wire at the starter with the key in the crank position. If there is no power than you will need to trace the circuit.
A Year, make, model, and engine size would help a lot!!
Hi Scott, What do you mean by 'won't crank?' Is the engine turning on the starter but refusing to start or is the engine failing to crank (turn over). If its the latter, try replacing the battery. If its the first option then send more details and we'll try to help out. Regards John
Could be the crank sensor is bad but If the check engine light does NOT come on when cranking at the times
when it won't start, then your ECU is in need of repair. The engine will
only start after the check engine light comes on and the ecu is what
controls that. It's likely going bad, causing the delayed start problem
typical of early 90's jeeps. Repair or replacement services for your
jeep ECU are available on ebay.
Try this procedure:
Check the battery like this:
Turn on the headlights, then try to start the car.
If the headlights do not dim or go out, then the battery is likely ok.
Check that the battery cable plus post, goes to the starter, Minus post to a good ground, like the engine.
If wiring is ok, then look at the starter solenoid for a good connection, and proper voltage at the starter.
Problem is most likely the Solenoid's bendix gear or starting relay, Have someone bang on the starter while you try to start the car. This usually works by dislodging the bendix gear..
Hope this helps.
This sound is the relay, Is the battery new if more than 1 and 1/2 yrs. you need to replace your battery. Is your engine cranking when start, if not, the battery need to be replace.
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