Mechanics

FUSIBLE LINKS

1991 Ford Festiva

Electrical problem
1991 Ford Festiva Front Wheel Drive Manual 200000 miles

Middle fusible link(main) gets extremely hot when car is running(nothing else on). IBattery is charging at 15.1 volts
I think it's overcharging any ideas?
Avatar
Budlee
April 9, 2009.



Hi there,

Thank you for the donation,

i agree, that charge rate is to high, I would start with getting the alternator bench tested and also check that the earths and battery terminals are clean and tight, start here.

Mark (mhpautos)

Mhpautos
Apr 9, 2009.
I changed out the Pos. Terminal connector on the battery and cleaned up the wires. I'm now getting a charge of 14.7vdc, this is probably normal. Can I assume that the fusible link will still stay hot to the touch when things are operating normally?

Tiny
Budlee
Apr 9, 2009.
HI there,

I feel that that charge rate is still a little high, the heat in the fusible link is a bit hard to judge with out feeling it first hand, I would still be inclined to be getting the alternator bench tested.

Mark (mhpautos)

Mhpautos
Apr 9, 2009.
I had the alternator tested and they say it's good but I don't feel comfortable with the charge voltage. When I say the fusible link is hot I mean smokin literally. Anymore suggestions before I take it to a garage?

Tiny
Budlee
Apr 9, 2009.
Hi there,
if it is that hot there is a short in the circuit somewhere, I will check out the wiring and post any further thoughts on the matter.

Mark (mhpautos)

Mhpautos
Apr 9, 2009.
Hi there,

Can you please identify which link is overheating? see pics.

Mark (mhpautos)


http://www.2carpros.com/forum/automotive_pictures/61395_Graphic_115.jpg



http://www.2carpros.com/forum/automotive_pictures/61395_Noname_61.jpg


Mhpautos
Apr 9, 2009.
It's B the one marked main

Tiny
Budlee
Apr 9, 2009.
OK,

so now we know what we are looking at, start pulling the fuses of the items listed in the text and check to see if the link is still hot. Do this one at a time and give it a chance to heat up.

Mark

Mhpautos
Apr 9, 2009.
It's getting late here so i'll check in the morning and let you know what I find. Thanks

Tiny
Budlee
Apr 9, 2009.
I pulled fuses one at a time with no success so I went and pulled every fuse except the engine(need that to start car) and it still has a hot link.I'm no electrical wizard but I still think it's overcharging despite the fact that the alternator passed the bench test.I think i'll take it to a Ford dealer and let them check it out. Thanks

Tiny
Budlee
Apr 10, 2009.