V1 2006 LSJ ABS Wire

[Robinjo]

Does anyone recall what wire on the BCM powered the ABS system? I need a switched-on 12V power source.

I do not have access to a wiring diagram or I'd look it up myself. Charmi never works on my compute for some reason.

 

[Robinjo]

All the red wires on the BCM are 11.5v and won’t power my gages. Looking for other options to pull from.

 

[Rttoys]

There’s 2 circuits that Lonny left in the harness for addons. Should be here, but they are the link wires you are already taking about, which is odd it’s not powering it on.

 

[Rttoys]

Another option is wiring off a relay in the back that’s not being used. Or directly off the battery to a relay and use any circuit to turn it on.

 

[Robinjo]

I do have one by the column but it’s always powered.

 

[Rttoys]

Hhmm. Ok.

I was thinking about it too. You said you are getting 11.5v? Is that battery voltage or is there a bad voltage drop? That would need to be addressed first if so.

 

[Robinjo]

Battery is 12.5 v but everything coming out of the BCM is 11.5-11.8 v

 

[Rttoys]

Hhhmmmm. I can check mine, but it should really be within a tenth of a volt. What do you have on the back fuse box?

 

[Gtstorey]

What are you using as a ground when you see the lower voltage? Check it to the negative terminal on the battery.

 

[Robinjo]

I have 12.49 v at the back B+ terminal on the fuse box

 

[Robinjo]

What are you using as a ground when you see the lower voltage? Check it to the negative terminal on the battery.

That’s where I ran the negative probe, to the negative post of the battery.
I’m trying to power my AFR and Boost gages, they will not power on running off the switch on from the BCM. They will if I go directly to the positive terminal of the battery.

 

[Rttoys]

Definitely need to check connections at the bcm and grounds. You shouldn’t have that much voltage drop there.

 

[Robinjo]

It’s every pink wire from the BCM. Even the constant power terminals have 11.5 volts.

 

[Rttoys]

That really needs to be batt voltage

 

[Robinjo]

So what do I start checking. I’m not electrical inclined so not sure where to start.

 

[Rttoys]

Mostly make sure connections are tight. Loosen all the grounds, move them back and forth to knock junk off them and tighten. Usually a ground that causes this. It’s not bad, but if it’s enough not to turn on the gauges, it’s low to cause other problems. Check voltages at fuses while you are there. See if is the whole unit or just hit or miss.

It’s just odd you lose a volt at the bcm.

 

[Robinjo]

It is every pink wire on the BCM. Other pink wires around the vehicle are 12.5.
I’ll do the grounds and disconnect/reconnect the bcm blocks. Also the hot wire from the battery to bcm and report back.

 

[Rttoys]

Powder coat and even surface rust make for a “dirty ground”. A little bit of sand paper or even a wiggle of the grounds make a difference. Hope that fixes it, then should make your gauges turn on like they are supposed to.