No blower on heater/cooler
If you know how to use a digital voltmeter than these instructions will be of help. If you don't know then take the vehicle to a repair shop.
Assuming that you know how to use a meter, Lets start with the horn. Check fuse, if a ok then remove horn from circuit and give it B+ and ground independently if it sounds Horn a ok, problem in clock spring ,or horn contacts are corroded. At this point if car has air bags bring it to a reputable shop. Cause if your not careful doing the electrical testing you can set off air bags and that will be a $1200 dollar mistake.
The rear heater is simple. Make sure the contacts are intact and clean on the glass. If they are then remove the switch bypass it and see if the rear screen heater turns on.(hook up meter to screen grid to check for B+) If it does the culprit was the switch.
Heater blower same principal. Circuit consist of blower, relay ,switch and resistor. First test blower remove contacts from blower and fabricate a B+ line and ground if the blower works then its a -ok.
If it doesn't replace blower. Again to test switch remove it and bypass it. Resistor Ohm out with a volt meter to see if resistance is higher than it should be. Remember at high speed you should have straight battery power going to that blower. If the fan doesn't go on high speed chances are its the switch cause RESISTOR is bypassed at this speed. YOU MAY NOT HAVE TO OHM OUT RESISTOR. GOOD LUCK FILL ME IN ON WHAT HAPPEN.
Dec 29, 2013 |
Peugeot 308 Cars & Trucks