Ei have a 1988 chevy silerado pickup 4 wd my heater blower motor was just replaced it was dead then it keep blowing the heater / ac fuse ? need help its cold here.

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How To Install Replace Heater AC Blower Motor Chevy ...

? 7:26
https://www.youtube.com/watch?v=jrGFY6yqvFM
Jan 4, 2011 - Uploaded by 1A Auto Parts
How To Install Replace Heater AC Blower Motor Chevy Silverado ..... you remove the cover, there is what looks like a door next to the motor that ...

YJ car.
the blower is dead. is that it?
does it blow full speed on high
do you have 12v on terminal A of blower , term B is 0v ground
got that, then the blower is dead.
if not 12v, then the controls are bad.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

page 47
4 parts to make blow
1: fuse 12 good.
2: switch heater /on off.
3: high, med,low speed, use high, its direct.
4: the blower,
one of those points has no 12v on high,
use a simple voltmeter to find the failed point.

Those four things should be on four different fuses.
As for the heater blower, I would unplug the blower motor to see if the short is in the motor. Someone will have to trace the circuits to find the short or shorts that are blowing the fuses. Could be something in the wiring harness that is touching bare metal.

Have you replaced the blower resistor . some times they can cause the fuse to blow . You may need a muiltmeter to test the current draw on the blower motor circuit. the draw should be less then half of the rated fuse .( 20 amp fues draw is less then 10 amps) You did not say but does the blower work on high only or the lower speeds with out blowing the fuse ? if it does work on low or high with out blowing the fuse i would replace the blower resistor

do not do anything more untill you have the problem checked, as you may start a wiring fire.
Find a qaulified GM mechanic to check the problem

you have a bad blower motor resistor

More than likely the fan motor its self is short to ground try to unhook the wires to the fan motor and install a new fuse and then turn the fan on with the wires removed and if the fuse is still good you know it is the fan motor its self

Blower is used for either AC or Heater demand. If it doesn't work in heater mode, but work in AC mode then it is a problem with the Climate Control. If it doesn't work in both cases, then check the fuse near the front fender on driver side ( It is not in the fuse box). If the fuse is good, then it is not necessary the blower is burnt, but the blower regulator is burnt. The Blower regulator is underneath of the blower. It can be accessed from the engine side under the wiper motor.

Check the blower motor speed control resistor, and all connections for good fitment.

Hi, sounds like your blower motor resistor needs to be replaced. If not the resistor, check the blower motor.