LBZ: Blower motor and resistor

[LBZFireMan]

Hey everyone, I think I need a new blower motor but I want some 2nd and 3rd, and however many more opinions from people that probably know a lot more about this than I do.

I noticed before that my A/C would randomly start blowing harder/softer but didn't think much of it. Got to the beach last week and thought that I didn't have any A/C then noticed that I only had A/C when I was moving and my cab recirculation was off. I checked my blower motor resistor and saw the plug was bad so I replaced it. Put in the new resistor and nothing happened. Checked my splicing (design change), everything was good. Checked my fuses and the 40A fuse under the hood for the blower was blown. I haven't replaced the fuse and tried it yet because I don't want to mess up the new $100 resistor I just put on.

Should the blower motor be my next suspicion or where should I go from here?

 

[Tothemax]

It's normal for that fuse to blow. Happens usually when cutting the old connector off. Put a fuse in and you will be fine:thumb:

 

[clrussell]

Replace the fuse and go from there.. Usually what I see is the resistor shorting out blowing the fuse..

However need to check amp draw of the blower motor to know if you need one of those too.

 

[Budneeds2beers]

Ok, thats not what to do... The resistor shouldnt blow the fuse. Imagine a train set and the knob that controls the speed. It works on the same principle as that adjusting the amout of load to the fan. If you ohm it out you should get multiple amounts of resistance per each pin. What it is i have no clue and it doesnt matter, but what does is if you get infinite ohms then you have a bad leg. What that means is it has a break in the line. (No flow) the resistor should have no path to ground if it does you have a problem you can ohm it or ring it out. After that check the connector might have melted. Mine did. For the fan dont check the amps.... If you have amps then it works. Ohm it and see what resistance you have. If infinite then its bad. If you want turn the fan slow and see what you have should be close ( ohm wise around .something) if its way different in a spot plan on replacing soon. Cheers man if you need more help hit me up.

 

[carl.swoyer]

I have replaced the resistor, that worked for a while. But now it seems the actuator in the dash is bad. I have to turn the ac on off several times to get the cold air.

Sent from my XT1254 using Tapatalk

 

[Budneeds2beers]

Ohm it see if you have continuity through the switch. You could have dust, lint, or the contact pads for the switch can be bad. If no flow on the meter then amazon will have what you need...:thumb: