Which battery cable to disconnect !

jeeptj1 · Post by **jeeptj1** » Wed Jul 02, 2014 2:53 pm

So I'm thinking about changing my gauges for the new repro ones.(they are rusty inside) Can I unhook any of the battery cables to kill it so I don't fry anything or is there a certain one that has to be undone. Thanks John jr

RICKG · Post by **RICKG** » Wed Jul 02, 2014 3:21 pm

Assuming youre still 24v, running (2) 12v batts you always disconnect
the negative cable FARTHEST from the starter. Or in other
words the neg that goes to your frame ground.

Do yourself a favor and indicate jeep type in your signature

Check it out John, I joined this outfit 1 day after you..

jeeptj1 · Post by **jeeptj1** » Wed Jul 02, 2014 5:30 pm

Sorry my bad, 52 m38 24 volt. One day difference and I don't know what battery to disconnect yet. Lol. Thanks

kenperkins · Post by **kenperkins** » Wed Jul 02, 2014 6:19 pm

negative cable under hood battery

oilleaker1 · Post by **oilleaker1** » Thu Jul 03, 2014 12:51 pm

The ground cable that goes to the frame is the safe one to disconnect. On a stock M38, it's the one at the front of the under hood battery box that bolts to the front of the battery mount. Now, when reconnecting, you will get a small spark and then nothing. That is caused by a capacitor in the voltage regulator.

RICKG · Post by **RICKG** » Thu Jul 03, 2014 1:02 pm

Here's a neat disconnect I installed to my M38. Not by any means stock or correct, but it's quick and handy. I use it every time I mess w/the
electrical sys.

Bretto · Post by **Bretto** » Thu Jul 03, 2014 1:26 pm

Rick, that's discreet. I know you added this and I'm thinking you mentioned, at one point its origin but where did you get that?

RICKG · Post by **RICKG** » Thu Jul 03, 2014 1:56 pm

Bretto wrote:Rick, that's discreet. I know you added this and I'm thinking you mentioned, at one point its origin but where did you get that?

"Grumpy John" @ MWM had some a while back.