ok, so i had the AC on high , and then it stopped,,,,
the vents don't blow out air(even when the AC is off) and the little button to push to make it blow more or less, doesn't light up when i push it in.....
whats the problem?? fuse???
thanks

 

I'm not sure what you are looking for ...
Do you need to know where the fuses are located or
do you need a description of how the blower circuit
operates ?

 

i need to know what would casue my blower to stop working.. and how to fix it.

 

Well If the blower is fried it dosn't take much to fix it, 25$ dollar part at most auto stores and about 35 minutes of your time.

-Ben

 

After checking fuse...

1. With the ignition switch "on"
Adjust heater control to "heater" mode
high blower speed and full hot

air flow ? No

Adjust blower speed to medium

air flow? No

2. switch to defrost

air flow ? No

3. Trouble shoot blower switch, harness, resistor assembly,
relay, blower motor

 

thanks for the pic, but my car looks different,, it seems to have 2 relays there. its an 88 350 tpi....... anyone know which relay to change? and what the other one is??

thanks

 

Look close
see the purple wire
it goes to the relay...

Yours will be similar

 

ok, after some messing around i found this out....
the blowers work intermitenly...
so i think it has to do with the buttons. when i mess with the buttons (go from A/C to OFF; Vent to OFF etc...)occasionaly it will come on, and i hear a clicking sound under the passenger side kick panel.... so is there something in there that controls this or what??
how do i fix this????????
thanks again

 

The resitor pack is used to change the current
delivered to the motor...

The relay is used for a "full power" mode

You need a DVM to go further...

And alternate method is to "shotgun"

That is, replace resistor pack, relay, control switches
and hope you "hit" something

 

thanks for the info.....
anyone else have any input...
it doesnt make sense that it works intermitenly.... if it were a bad relay wouldnt it not work at all??

 

ok, so how do i go about diagnosing which part to replace???? i don't want to buy and replace parts unnecessarily.

thanks

 

Check fuse ok ?

Do you have a DVM ?

If yes...

Pull the weather pack of of the blower motor
Measure across the connector with blower on high...
You should see battery voltage....

If you see battery voltage
motor is bad

If you do not see battery voltage...
Either the relay is bad or it is not being activated....

go to resistor pack...
put blower in some lower setting
there is a one to one correspondence
betwen blower speed settings and the wires going
to the resistor pack. One of these will have
battery voltage depending on the blower speed
setting

If not likely that one of the two interior switches is
misbehaving...