Mechanics

FUSIBLE LINK..HOW DO I KNOW ITS BAD 1500

2003 Dodge Ram • 113,000 miles

2003 dodge ram 1500 4x4 5.7. Fuses check ok. Battery and alternator check ok. Still large voltage drop problem under load.
With ac. Fan high. Lights on. Etc. What is this fusible link. How do I test.I am getting 12 volts to alternator with truck off. My research on the link shows that it will burn out during spike in voltage. Wouldn't that mean I would not get 12 volts at alternator with truck off? Thanks
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Mikemuka
May 9, 2013.



Who and how was the alternator checked?

Ifr you had a bad link, many functions would not be workign

Roy

Advance autoparts. And I also tried myself with meter 12v at off.13.8-14 v runningdrops when apply full load ac. Lights etc 11.8-12. Dash dims voltgage below halfat stop then drive volts go back up lights brighten etc. This has been a problem ever since I gave my buddies truck a jump. Been through 2 alternators and batteries sice to try and correct problem. Also new drive belt. It has never thrown a code for this issue. Till now.I think unrelated. Slightly rough idle. Code357. Coil pack 7. I love the truck. Its driving me crazy.

Tiny
Mikemuka
May 10, 2013.