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SportTrac Discussion
Electrical
Electrical system does not charge above 70MPH
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<blockquote data-quote="TrainTrac" data-source="post: 821401" data-attributes="member: 55399"><p>I agree with Les. I don't think it's a diode, it sounds like the belt, or something else RPM-related. Focus more on engine RPM than vehicle MPH. Check the voltage with a multimeter while the engine is idling, then <strong>while the vehicle is in Park and the E-brake is engaged, or better yet, up on four jack stands </strong> have someone rev the engine up and down the RPM range and see what it does. Then, check it while holding the RPM's up around what they would be at 70mph.</p><p></p><p></p><p></p><p>Also, take it to Autozone, Advance Auto, or whatever auto parts store is in your area. Most of them run an electrical system check for free. This might help you diagnose the problem.</p></blockquote><p></p>
[QUOTE="TrainTrac, post: 821401, member: 55399"] I agree with Les. I don't think it's a diode, it sounds like the belt, or something else RPM-related. Focus more on engine RPM than vehicle MPH. Check the voltage with a multimeter while the engine is idling, then [b]while the vehicle is in Park and the E-brake is engaged, or better yet, up on four jack stands [/b] have someone rev the engine up and down the RPM range and see what it does. Then, check it while holding the RPM's up around what they would be at 70mph. Also, take it to Autozone, Advance Auto, or whatever auto parts store is in your area. Most of them run an electrical system check for free. This might help you diagnose the problem. [/QUOTE]
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SportTrac Discussion
Electrical
Electrical system does not charge above 70MPH
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