Problem with my 2007 Chevrolet Impala 3.5.
Repair for this problem = replaced connector on rear window defogger under warranty
tip/donation yes
GM tech = JK
question = My rear window defogger won't work. I have checked the relay and window
grid and both are ok. When I push the on switch the little light comes on. When I had it
fixed under warranty they said they replaced a connector somewhere around or under
the dash. They said it was a known GM problem something about moisture getting to it.
The part they used was #89046970. My problem is where it is located and how to get to
it. Thank You
JK:
Odds are that the repair under the dash is not the problem again.
This connector has a problem with terminals getting hot and sort of burning. It is under
the passenger side of the dash. Remove the carpet trim at the passenger side door.
As the harnesses go up from the floor to dash, disconnect the large connectors and
look for burned terminal / connectors.
Another common cause is that the terminal on the actual grid has come loose.
Either on the dr. side or pass. side of the glass.
A black connector plugs into a terminal that is soldered to the grid. One one each side
of the glass. Look at those.
If the connectors on either side of the glass are good, use a test light to check for
power at 1 and ground at the other. If power in, ground side OK, then you have some
burned grid lines.
This grid is also the radio antenna, so 1 side will have 2 terminals.
Repair for this problem = replaced connector on rear window defogger under warranty
tip/donation yes
GM tech = JK
question = My rear window defogger won't work. I have checked the relay and window
grid and both are ok. When I push the on switch the little light comes on. When I had it
fixed under warranty they said they replaced a connector somewhere around or under
the dash. They said it was a known GM problem something about moisture getting to it.
The part they used was #89046970. My problem is where it is located and how to get to
it. Thank You
JK:
Odds are that the repair under the dash is not the problem again.
This connector has a problem with terminals getting hot and sort of burning. It is under
the passenger side of the dash. Remove the carpet trim at the passenger side door.
As the harnesses go up from the floor to dash, disconnect the large connectors and
look for burned terminal / connectors.
Another common cause is that the terminal on the actual grid has come loose.
Either on the dr. side or pass. side of the glass.
A black connector plugs into a terminal that is soldered to the grid. One one each side
of the glass. Look at those.
If the connectors on either side of the glass are good, use a test light to check for
power at 1 and ground at the other. If power in, ground side OK, then you have some
burned grid lines.
This grid is also the radio antenna, so 1 side will have 2 terminals.
