my son hooked the jumper cables on reverse on 1977 f150 with a 390 he said there was some poping and smoke coming from the battery side of the engine. does any one know what could have blown from this, or if this happend to you and how you fixed it, also if anyone knows or has a diagram of where the fuseable link is. thank you very much~Blake

 

there are fusible links that connect to the battery side of the starter solenoid on the fender, also possible damage to the alternator and regulator. hopefully fusible link(s) will be all.

 

eh, put in a good battery and see if it runs. If everything works, say a hail mary and drive it till something goes out.

 

The fusable links are within a couple of inches of the solenoid. And look like a square piece of rubber around the wire. If the wire is flimsy at that point the link worked..... Same thing happened to my son, within a week the Alternator needed to be replaced...Good Luck

 

thanks ill deffinitly check that out

 

I don't think the fusible links would go because all that happened is the battery polarity was reversed. The links protect against shorts that cause massive current flow, which breaks the links. What happened here isn't a short, it's the battery going in backwards, essentially.

The smoke most likely came from the rectification diodes in the alternator; there are six of them and they are reverse biased straight from BATT to ground and straight reverse voltage across them could have smoked them. awsmev, this is why you had to have your alternator replaced.

In other words, blakeusa - my guess is the smoke came from the diodes in the alternator so you might be looking at alternator problems. I would pull it and have it checked at Autozone or somewhere similiar - an alternator test machine should be able to find an open diode pretty easily. I would have the voltage regulator checked too, for good measure.

 

Hey AWSMEV can you post some pics of your 350 SC Thanks

 

I accidentally reversed a set of jumper cables a few years ago. Didn't hurt either of the trucks involved, but totally melted my jumper cables.

 

My stepdad ran me over when I was a kid, I was holding the jumper clamps at one end, the other end still attached to the battery in his truck. Clamps touched, sparks flew, truck died. He kept having to replace miscellaneous things after that, after awhile the truck was "stolen" and he received a healthy insurance check. 20+ years later, I'm still a bit jumpy around jumper cables.

 

I pick it up next week from the paint shop...Will post when it is back during reassembly.
Evan

 

OUCH, serves that jerk right to have electrical problems after that.... Too bad he got an insurance check out of it though. Whats up with running over his wife's kids? Did your mom not give him hell for that, and how bad did he get you??

 

It was definitely an accident, we were jumping an old Datsun pickup (it was orange, too, lol). He got thing started, I removed the cables, then he attempted to put it in reverse but instead it lurched forward and knocked me down. Back in those days, I was scrappy enough to flatten out and fit underneath. He found reverse real fast, thinking I was pinned between the two trucks. No major injuries, a little bruised, a lot terrified of jumper cables.

Unless it required a doctors visit, we never told mom anything that happened out at the truck yard (he owned a dump trucking business). If my mother only knew...

 

LOL, if your mother only knew, your step dad would be D-E-D, dead! I just learned something new, you cant change your text to match the color of the background....































(yes the A is missing, its on purpose)