Battery isolator

[Kofkof_00]

Has anyone here ever wired in a battery isolator for a second battery?

[PoonRacing]

Yes, got one from the local Car Audio shop, is like $50 buck. I hook all the amps & capacitor on second battery

[Kofkof_00]

How exactly did you wire it in?

It came with a bunch of possible wiring diagrams, none that match what I have.

Essentially, they want you to wire it into the alternator. They say that there should be a plug with orange and black, and red and black wires to re-rout to the isolator... Mine is not at all like that. I have a white wire (alone big plug) And a red and black wire on their own plug off the side or the alt...

[Kofkof_00]

I think I'm going to call the isolator place. They said they had tech support.

I need to, I miss having my carputer.

[PoonRacing]

will be the white wire, unhook it from the alternator and tape it up not use, run a new wire from that to the isolator, leave the main battery positive cable hook up than add a new cable run it to the isolator, same for the second battery.

[Kofkof_00]

The closest diagram I found is this. (it does specify 1998 and later fords though? My car is a 92...)


The part that really twists my noodle is the "excitor" connection (E) that I should send to a 6amp circuit breaker, then to an ignition run connection in the fuse center???? WTF?

[Kofkof_00]

All Group 2 Isolators may be used in Group 1 applications. Simply disregard the additional excitation ("E")
terminal. A Group 2 Isolator will have a colored fourth terminal indicating the "E" terminal.

This is needlessly complicated. I'm going to go talk to the rv guys.

[Kofkof_00]

So I went to Ken's he has a parts car, i was able to figure it out. All Group 2 Isolators may be used in Group 1 applications. Simply disregard the additional excitation ("E") was the clincher.

[stefan]

From what I can tell it looks like (E) is there so you can use your second battery to start your car if your first one is low/dies.