GMC Troubleshooting Questions? Ask a Mechanic for Answers
I am sorry your having this problem
do you have a good multi meter on hand ?
when these make this type of noise it usually is one of 3 things
not a full 12 volts to the motor
not a good ground
defective motor assembly
if you make a temporary good ground and connect it into the black wire terminal with the motor still connected all up will it work ?
just slide it into the back of the motor connector into the black wire terminal with it plugged in it should reach the terminal in the connector
if your sure it was making a good connection in the back of that black wire terminal then take it out if there and put it in the back of the pink/black terminal will that do anything ?
there is not much but power and grounds to that motor
yes it can be the switch or a low power issue through the orange wire or one of the 2 wires from the switch to the motor being bad
we would need to test for the powers and grounds at the motor to see if its a wiring issue or switch issue or a defective motor
there is not much back there for power to use to try a new power to the solid orange wire
does the rear washer work good ?
not a charger will not work unless its a booster that might work
since the washer works fun with everything connected if you made a jumper and jumped the orange wire terminal to the white wire terminal with a wire jumper will it work or do anything different when you jump it and use the washers ?
should be E
we really need a multi meter to see whats going on here at the motor
key ON unplug the motor and red meter lead to the orange wire terminal and black meter lead to the black wire terminal in the connector meter set to DC what does it read for volts ?
either is fine
if you plug it back in and turn on the rear wiper when its acting up what will that read for volts back probing those 2 terminals ?
that is a lot lower than 12 volts
can you somehow run good 12 volts to that orange wire and see if it will work ? either a jump box or jumper cables or something like that ?
if you jump that ground to the pink / black wire with it all plugged in it still will not work ?
lets see if any other experts have any ideas
hang on another expert will reply back to you