fuse blows....sometimes
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Joined: Feb 2011
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fuse blows....sometimes
15 amp fuse#21 inside cab blows.... sometimes, not with the key on,...only when starting. will start 4-5 times ok then will blow?
starter was rebuilt when this first happened.
could this be the starter relay?
or the ignition switch?
any other ideas?
where should i test first
thanks roscoewalsh2010@gmail.com
starter was rebuilt when this first happened.
could this be the starter relay?
or the ignition switch?
any other ideas?
where should i test first
thanks roscoewalsh2010@gmail.com
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
F21 is hot ONLY when cranking. It would be extremely long odds that the starter relay is causing the intermittent short A wiring harness is a far more likely problem. The starter motor itself cannot cause this problem.
Have you had any exhaust or transmission work done? The harness for this circuit is easy to damage when doing this type of work. Otherwise, in might be damaged due to chafing or rubbing.
It is necessary to identify your vehicle including year, model, engine, and transmission since there are considerable variations between the different versions. Also, identify if any aftermarket alarms or security systems are installed.
Have you had any exhaust or transmission work done? The harness for this circuit is easy to damage when doing this type of work. Otherwise, in might be damaged due to chafing or rubbing.
It is necessary to identify your vehicle including year, model, engine, and transmission since there are considerable variations between the different versions. Also, identify if any aftermarket alarms or security systems are installed.
Hotshot
Joined: Feb 2003
Posts: 11,537
Likes: 27
From: Long Beach, Ms.
Again I suggest that the relay be checked as the source of the problem. It may be pulling too much power.
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blang
1997 - 2003 F150
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Mar 25, 2009 09:03 AM
