99astro rear heat and a/c blowers will not work Ido not think this is afuse problem.are there inline fuse blocks that could be breaking down?also the daytime running lights do not work either both of these items have worked since they initally stopped working.but both have know stopped again.
I sounds strange that both blowers do not work. The A/C blower is in the back of the van, the heater is behind the driver at floor lever. Maybe a power line has came off behind the two switches in the center console. Check the fuses again just to be sure (under the hood on driver side). The daytime running lights will shut off if you depress the parking brake - check if it is fully released. That switch on the parking brake lever would be the first thing I check.
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Did you check the proper fuses for voltage? Some fuses are hot all the time, some go hot with the key on. Even if fuses are good, if no voltage the circuit is still dead. I guess your talking about the blower motor? Can you hear it running? I don't know if you auto hvac or manual hvac? I don't know if your talking about front or rear blower motor?
Get at the blower motor, if two wire connector, that should be voltage and ground. Turn on the hvac controls, check for voltage and ground at the blower motor connector. If good voltage and ground with no blower action, suspect the blower motor.
It is possible to use jumper wires from the battery for voltage and ground to blower motor connector, just for testing to see if blower motor will run, use an inline fuse, just in case.
If you want wiring diagram, I need more info.
Hi, Micheal Your car was tested when new to not let moisture into any electrical components at the factory, however with age and use sometimes a little water can sneak in. You are correct in assuming the Circuit Resister Block has been affected. That is where I would go 2nd following the fuse 1st. If the fuse is powered and good, check to see if you have power to the blower itself and you have no voltage at the blower the inline circuit fused link is suspect. If there is voltage at the blower and it is not working I'm afraid you may have burned the blower motor. NEVER EVER spray cold water on a warm~running engine. possible effects: cracked head~block, shorted ignition circuit, or other electric components. While you car is designed to resist water, They generally cannot protect it from COLD water sprayed directly onto it. That I'm afraid is physics. I hope this helps you Sir. Good luck, I'm here if you have further insights. Thank You for using FixYa.com!
The most common problem would be a bad blower at which you can test for power at the motor connector with a testlight, the other most common problem is the resisitor ,theres one for the front blower and one for the rear blower, you may have a bad resisitor for the rear blower this resistor is located next to blower.theres also arelay in the fuse/relay box next to the battery under the hood,the best thing is to start testing for ower at the switch and work your way to resistor, i think you will find a bad resistor to rear blower motor.heres a complete wiring diagram of the whole front and rear heat and ac unit, everything is labeled good luck.
#26 40 amp orange fuse ---it is under the hood of vehicle in fuse box. Relay labeled "F" in passenger comp on juction block behind left side of dash is for rear blower motor, front blower motor relay is behind juction box.
start by check all fuses, then check for power at rear blower.if fuses are good and you have power then may have bad blower,if no power and fuses are good then may have bad resistor. hope this helps good luck.
probably the blower needs to be replaced, by the age of the vehicle i would think the motor is worn out.remove it and test.the only fuse is in the fuse block. the next possibility is the controls on your climate control console.
If it's not working on HIGH speed it's a fuse that you will find inline and up on the firewall amongst the wires coming from the blower motor. I would first hook a wire to the positive side of the battery and touch it to the terminal on the blower motor. If it's the other speeds rather than the high speed I believe that is taken care of by replacing a fuse in the fuse block down under the dash on the drivers side. Good Luck!!