Isuzu Trooper (year 2000) wiring question?

Question

I have a UK Isuzu Trooper Insignia Mk IV (year 2000, V reg).

I want to connect an accessory to the positive terminal of the accessory battery. I have wired up the accessory, and it has a ground wire and positive wire waiting to be connected. Question is, what do I do next?

I don't know if I should disconnect the negative terminal on top of each battery (or if that's even possible on one of these) before I continue?

Previously I'd always just disconnect the negative terminal of a vehicle battery, then proceed, but I've never had a dual-battery vehicle, and I know there's a split-charge relay underneath somewhere; I hope I don't need to touch that?

I'm quite lost, intuitively I would think to try and disconnect both negatives, but how?

Thanks in advance.

Anonymous · Accepted Answer

Hi there i take  you have a 24 volt system i presume you are putting in a 12 volt accessory or is your vehicle batteries in Parallel  when you say a split charge relay then i would guess you have your batteries in parallel your accessory would go on the main battery the one where the ground wire goes to chassis and the positive cable to starter motor this is the one you use your accessory on as long as it is not a high amperage accessory. you do not have to disconnect the two batteries just disconnect the twp positives until you have fitted your accessory wires. Jock

? · Answer

If you have all the repair and maintenance records, and have done a check to see if it's never been in an accident, and you're not putting many miles on it yourself, it DOES sound like a good deal. What does the Kelley Blue Book say about that price?

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Isuzu Trooper (year 2000) wiring question?

2 Answers