No air blowing 97 Silverado
#12
Fan works well connected to directly to 12v.
It must be that harness, I should be able to get varying readings as the fan speed is adjusted. One thing I saw said the harnesses often get too hot. Have that on order.
Also saw someone getting a click in the relay mine doesn't appear to make any noise, I have a new relay as well and the results are the same, and they tested out as far as I can tell. The last thing would be the blower control switch?
Thanks for the tips!
It must be that harness, I should be able to get varying readings as the fan speed is adjusted. One thing I saw said the harnesses often get too hot. Have that on order.
Also saw someone getting a click in the relay mine doesn't appear to make any noise, I have a new relay as well and the results are the same, and they tested out as far as I can tell. The last thing would be the blower control switch?
Thanks for the tips!
#14
#16
You said the fan works on high speed right? The relay is for high speed, so you've ruled that out
Switch fan to speed 1. You should have 12V (with negative probe on ground) where the yellow wire goes into the resistor
switch to speed 2. You should have 12V on the tan wire
switch to speed 3. You should have 12V on the light blue wire
Switch fan to speed 1. You should have 12V (with negative probe on ground) where the yellow wire goes into the resistor
switch to speed 2. You should have 12V on the tan wire
switch to speed 3. You should have 12V on the light blue wire
#17
You said the fan works on high speed right? The relay is for high speed, so you've ruled that out
Switch fan to speed 1. You should have 12V (with negative probe on ground) where the yellow wire goes into the resistor
switch to speed 2. You should have 12V on the tan wire
switch to speed 3. You should have 12V on the light blue wire
Switch fan to speed 1. You should have 12V (with negative probe on ground) where the yellow wire goes into the resistor
switch to speed 2. You should have 12V on the tan wire
switch to speed 3. You should have 12V on the light blue wire
the fan works ‘sometimes’ in Hi.
#18
Good. So the control panel works.
Now measure the dark blue wire where it goes into the relay , in speeds 1, 2 & 3
there should be something around 3V, 6V, and 9V
when it doesn't , try smacking the motor with a mallet. Flick the relay, or jiggle the wires and connectors around.
Now measure the dark blue wire where it goes into the relay , in speeds 1, 2 & 3
there should be something around 3V, 6V, and 9V
when it doesn't , try smacking the motor with a mallet. Flick the relay, or jiggle the wires and connectors around.
#19
that would mean resistor not doing its job?