2006 Chev Trailblazer 4.2, 272,000km.
First onset was spring 2020, abs and brake light intermittently came on while driving through slush and snow. Eventually it stayed on. Internet searches show that both lights on were related to ECBM issues and or ignition switch.
Ignition switch was swapped out with the lighter colored updated one. No change. Checked the ECBM ground on the frame, under the driver position. Cleaned it several times and even daisy chained it to two other grounds. No change. I just left it and drove it.
Now, I need to prep this vehicle for daily use again. Got a transfer at work and my oldest daughter is on the cusp of getting her license. Today I sourced an OTC Genysis or whatever it's called. P0412 and P0418 present but related to the AIR pump I tore off 8 years ago. Main code was U1040 ECBM connection issues.
Pulled the connector off the ECBM, the pins were clean and the wires leading into the pack appeared fine. Pulled the circuit board out, appears fine but unlike all the kelsy hayes units that litter the internet, I don't know the make or model of this one. So I am unsure if this model is prone to cracked solder joints.
Key on, engine off, the two main connector pins #2 and #31 have battery power. Both grounds #16 and #45 have next to nothing for resistance when tested to the ECBM frame ground.
So now I am at a loss for where to look next. Perhaps I dig through the wiring harness as the looms are full of dirt and grime, perhaps come across a busted wire. Anyways, thanks for reading.
First onset was spring 2020, abs and brake light intermittently came on while driving through slush and snow. Eventually it stayed on. Internet searches show that both lights on were related to ECBM issues and or ignition switch.
Ignition switch was swapped out with the lighter colored updated one. No change. Checked the ECBM ground on the frame, under the driver position. Cleaned it several times and even daisy chained it to two other grounds. No change. I just left it and drove it.
Now, I need to prep this vehicle for daily use again. Got a transfer at work and my oldest daughter is on the cusp of getting her license. Today I sourced an OTC Genysis or whatever it's called. P0412 and P0418 present but related to the AIR pump I tore off 8 years ago. Main code was U1040 ECBM connection issues.
Pulled the connector off the ECBM, the pins were clean and the wires leading into the pack appeared fine. Pulled the circuit board out, appears fine but unlike all the kelsy hayes units that litter the internet, I don't know the make or model of this one. So I am unsure if this model is prone to cracked solder joints.
Key on, engine off, the two main connector pins #2 and #31 have battery power. Both grounds #16 and #45 have next to nothing for resistance when tested to the ECBM frame ground.
So now I am at a loss for where to look next. Perhaps I dig through the wiring harness as the looms are full of dirt and grime, perhaps come across a busted wire. Anyways, thanks for reading.
