1988 Ford Bronco No crank

Tiny
BABYLOVE
  • MEMBER
  • 1988 FORD BRONCO
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
Hi, I have a no crank problem. I bought a new starter and solenoid and now a buzz at solenoid and still no crank.
Monday, February 23rd, 2015 AT 12:46 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
A loud buzzing from the solenoid is due to low voltage. Start by measuring the battery voltage. It will be 12.6 volts if it's good and fully-charged. Measure it again, right on the posts, not the cable clamps, while a helper tries to crank the engine. If it drops below about ten volts, replace the battery.

If the voltage stays fairly high, move the positive meter probe from the battery's post to the cable clamp and measure again during the attempted cranking. Now move the negative probe from the post to the cable clamp and try again. You're looking for a point at which the voltage drops noticeably. That is the point of the loose or dirty connection.
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Monday, February 23rd, 2015 AT 12:52 PM

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