Engine Quits When Brakes Applied

DrewE wrote:
It could also be a bad ground; in fact, I would think that equally as likely as a short.

That would be my first guess.

crasster wrote:
Bad ground or short. Are there any other symptoms such as power seeming low?

I found the problem. See a post above.
Thanks for all the replies.

Bad ground or short. Are there any other symptoms such as power seeming low?

Yep. Sounded like a recent adjustment.
Good to know it is found.

Thank you for posting the answer. I was trying to understand how this problem was possible.

Fred

Join the club...you are amongst good company..Thanks for letting all know you are OK and well...At least it didn't cost you a tow, and such all to find this out...

I found the answer to this problem and it is embarrassing.

For another problem, I had removed a diode from the fuse block to test it.
You guessed it.
I put it back in backwards. Not my smartest move, but not even close to the dumbest thing I ever did.

Sounds like dead short from brake lights to ground..or alternator...try this...take out brake light bulbs....try again, if it dies, then it is alternator short when brake switch closes...what about other electrics...headlights?...wipers?...if they are OK, I'd take out the brake light bulbs and try again...if you go OK, then start putting back brake light bulbs until it happens, then there's the short....also remember to disconnect center stop light too....I don't envy you and I wish I could be there to help you...Chasing down electrics like this could be a real b****

Shorts blow fuses. Might be an intermittent open - positive or ground.

bullydogs1 wrote:
Here's another way to prove it....after starting vehicle, hold batt bank jump switch..this will put house batteries in circuit, step on brake, if it is OK, then let go of switch, then it it dies, engine battery.

Did this.
Engine still dies with both sets of batteries.