AussieHJCruza
Supporting Vendor
- Joined
- Jul 8, 2013
- Threads
- 64
- Messages
- 2,960
- Location
- New South Wales, Australia
- Website
- www.completecruisers.com.au
G'day guys and girls,
I've recently aquired a JDM import HJ61, and given that 12v is the norm for cruisers here, I'm not too familiar with the whole 24v thing, so I'd really appreciate some help, because this has me a bit boxed;
1) Wiring is interesting to say the least; some people shouldn't be allowed to work on vehicles.
2) Batteries were dead when I got the truck
3) Put in 2 new identical 630cca batteries in April
4) Was fine for a few weeks, and then after sitting for a week, dead as a doornail.
5) Have been jump starting it since due to being flat out in other areas of life and it not being a daily driver
6) Bottom battery charges fine and had 12ish volts across it
7) Top battery was down a few volts, but wouldn't take a charge. Charger declares it faulty
8) Took battery back to the shop today, and they confirm it has over 12v across it, but polarity is reversed, which apparently means that it has been connected backwards
It's the last one that has totally confused me, but first, a bit of troubleshooting ive done
1) With positive off the top battery, multimeter shows very little discharge when put between lead and battery terminal. (as in, 0.something of a milliamp)
2) When vehicle running, both batteries have >13 volts across them, bottom one shows that on the multimeter, top one flashes as ~26 then returns to the 13-14 volt mark.
3) When running, between + top and - bottom, multimeter shows ~27 volts
4) When I connect the top + terminal, there is generally a small spark
5) I strongly doubt I connected the top battery backwards, otherwise I would expect that it wouldn't work and would be arcing and carrying on.
Is the battery place trying to fob me off, or is it possible that there's serious wiring screw-up somewhere or something else weird going on? Batteries are hooked up as follows: body & engine block -> bottom neg -> Bottom pos -> top neg ->top pos to vehicle. That is correct isn't it?
Would really appreciate some help, if I can't figure it out it will go to a truck electrical place near me, but I would rather not spend that sort of money if I can avoid it, and I'd also like to learn about the 24v system.
Thanks in advance!
I've recently aquired a JDM import HJ61, and given that 12v is the norm for cruisers here, I'm not too familiar with the whole 24v thing, so I'd really appreciate some help, because this has me a bit boxed;
1) Wiring is interesting to say the least; some people shouldn't be allowed to work on vehicles.
2) Batteries were dead when I got the truck
3) Put in 2 new identical 630cca batteries in April
4) Was fine for a few weeks, and then after sitting for a week, dead as a doornail.
5) Have been jump starting it since due to being flat out in other areas of life and it not being a daily driver
6) Bottom battery charges fine and had 12ish volts across it
7) Top battery was down a few volts, but wouldn't take a charge. Charger declares it faulty
8) Took battery back to the shop today, and they confirm it has over 12v across it, but polarity is reversed, which apparently means that it has been connected backwards
It's the last one that has totally confused me, but first, a bit of troubleshooting ive done
1) With positive off the top battery, multimeter shows very little discharge when put between lead and battery terminal. (as in, 0.something of a milliamp)
2) When vehicle running, both batteries have >13 volts across them, bottom one shows that on the multimeter, top one flashes as ~26 then returns to the 13-14 volt mark.
3) When running, between + top and - bottom, multimeter shows ~27 volts
4) When I connect the top + terminal, there is generally a small spark
5) I strongly doubt I connected the top battery backwards, otherwise I would expect that it wouldn't work and would be arcing and carrying on.
Is the battery place trying to fob me off, or is it possible that there's serious wiring screw-up somewhere or something else weird going on? Batteries are hooked up as follows: body & engine block -> bottom neg -> Bottom pos -> top neg ->top pos to vehicle. That is correct isn't it?
Would really appreciate some help, if I can't figure it out it will go to a truck electrical place near me, but I would rather not spend that sort of money if I can avoid it, and I'd also like to learn about the 24v system.
Thanks in advance!