Week 7 of this Lb7 in my shop. Granted I've not spent 7 weeks working on it I've spent plenty of time on it.. I hate to even remotely ask for help on this stuff but I'm about at my wits end with it and hate to just send it not being fixed.
Long story short, customer installed his own cluster and has had this issue ever since. It's been at the dealer for a month and two other shops before me..
What happens is the truck will randomly loose class 2 data and shut down many functions of the truck. Power windows locks, ac, gauges, abs dings etc..
It pretty much has to be cluster related as right now I have the under dash splice pack out of the truck and just the cluster, ecm and hvac hooked up (it's hot as balls and I want some ac while I'm in there). Truck will still randomly fail and I have got it to loose scanner communication, which the only way to return scanner comm is to cycle the key or unhook the cluster pin at the splice pack.
A known good cluster has been installed by me, and every other shop it's been to..
It's not loosing power or ground to the cluster at anytime it shouldn't, every wire in the data bus on those circuits has been load tested (even ran a new one to the cluster from s.p.)
I've plugged in different Tcm, ficm etc.. I have not tried another ecm but it's reman from the dealer I believe from when they had it.. bcm has been changed too by other shops..
Do I burn it? I'm loosing my a$$ on it, but want to fix it.
Long story short, customer installed his own cluster and has had this issue ever since. It's been at the dealer for a month and two other shops before me..
What happens is the truck will randomly loose class 2 data and shut down many functions of the truck. Power windows locks, ac, gauges, abs dings etc..
It pretty much has to be cluster related as right now I have the under dash splice pack out of the truck and just the cluster, ecm and hvac hooked up (it's hot as balls and I want some ac while I'm in there). Truck will still randomly fail and I have got it to loose scanner communication, which the only way to return scanner comm is to cycle the key or unhook the cluster pin at the splice pack.
A known good cluster has been installed by me, and every other shop it's been to..
It's not loosing power or ground to the cluster at anytime it shouldn't, every wire in the data bus on those circuits has been load tested (even ran a new one to the cluster from s.p.)
I've plugged in different Tcm, ficm etc.. I have not tried another ecm but it's reman from the dealer I believe from when they had it.. bcm has been changed too by other shops..
Do I burn it? I'm loosing my a$$ on it, but want to fix it.
