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Fusible link to battery is red hot - HELP

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Offline bbutler455

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Fusible link to battery is red hot - HELP
« on: November 11, 2012, 06:58:08 AM »
Trying to get this old Samurai back on the road.  There is a fusible link to the battery that gets red hot when you rev the engine.  The link is a green wire and the wire to the loom is much bigger and yellow/tan.  The link wire is cool at idlel but heats up very quickly at higher RPMs.   If I disconnect the wire it kills all the electronics on the car.  I have disconnected all the emissions equipment when I installed a weber kit.  How do I fix this?

Brock
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Brock
1986 Samurai with Suzuki removable hardtop, 1.6 8V TBI, Vintage Air, OME springs, 235/75 tires
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Offline airdale navy

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Re: Fusible link to battery is red hot - HELP
« Reply #1 on: November 11, 2012, 07:15:58 AM »
Let's trouble shoot!Are you running the stock alternator?Or a GM upgrade?Take the wire off and check for bare wire.Take the alternator off and take it to the part store and have it check.




















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91 sidekick,8v,sky 1.5 lift,235 tires,full synthetic oils !GM alternator upgrade.Ford Mustang coil.4DR front brakes.
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Offline bbutler455

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Re: Fusible link to battery is red hot - HELP
« Reply #2 on: November 11, 2012, 10:22:42 AM »
Quote from: airdale navy on November 11, 2012, 07:15:58 AM
Let's trouble shoot!Are you running the stock alternator?Or a GM upgrade?Take the wire off and check for bare wire.Take the alternator off and take it to the part store and have it check.

Stock alternator.  I'll have it checked.  I will only have a good stereo and small amp - do I need a GM alternator?


















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Brock
1986 Samurai with Suzuki removable hardtop, 1.6 8V TBI, Vintage Air, OME springs, 235/75 tires
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Offline airdale navy

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Re: Fusible link to battery is red hot - HELP
« Reply #3 on: November 11, 2012, 01:01:59 PM »
No you don't need a gm alternator upgrade.Check The wire for bare spots.
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91 sidekick,8v,sky 1.5 lift,235 tires,full synthetic oils !GM alternator upgrade.Ford Mustang coil.4DR front brakes.
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Offline bbutler455

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Re: Fusible link to battery is red hot - HELP
« Reply #4 on: November 11, 2012, 07:44:01 PM »
Quote from: airdale navy on November 11, 2012, 01:01:59 PM
No you don't need a gm alternator upgrade.Check The wire for bare spots.

Am I looking for bare wire that might be shorting?
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Brock
1986 Samurai with Suzuki removable hardtop, 1.6 8V TBI, Vintage Air, OME springs, 235/75 tires
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Online fordem

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Re: Fusible link to battery is red hot - HELP
« Reply #5 on: November 12, 2012, 05:17:54 AM »
The question would be 'shorting' to what?

A short to chassis will blow the fusible link in the blink of an eye - my guess is you have an over charge situation.
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Offline bentparts

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Re: Fusible link to battery is red hot - HELP
« Reply #6 on: November 12, 2012, 04:53:09 PM »
Check the alternator output simply by using a multi meter or run of the mill volt meter connected to the battery while running and revving. Or just go to your local Auto Zone and have them do it.
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Offline bbutler455

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  • 1986 Samurai, 1.6L8V TBI, AC, headers, OME
Re: Fusible link to battery is red hot - HELP
« Reply #7 on: November 12, 2012, 09:20:53 PM »
Good call guys.  Took the alternator to O'reilly's - bad alternator.  $80 for a re-manufactured unit and problem solved.  Thanks to everyone.

Brock
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Brock
1986 Samurai with Suzuki removable hardtop, 1.6 8V TBI, Vintage Air, OME springs, 235/75 tires
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Offline warbird

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Re: Fusible link to battery is red hot - HELP
« Reply #8 on: November 13, 2012, 11:28:48 AM »
I'd replace that fusible link too.
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