Detector
Well-known member
- Joined
- Nov 6, 2011
- Messages
- 232
- Reaction score
- 0
- Location
- Dodge City, KS
- My Car
- 1973 Mach 1 Q Code
1995 GT Convertible
Now I've run into this problem before but darned if I can remember what causes it. The heater blower motor works on high but nothing on the lower speeds.
Also, I noticed I had 2 fuses missing from my fuse box under the dash one was the heater(14A) and the other was courtesy lamps(14A). I put new fuses in thinking that was why my heater blower didn't work, even on high, and then it would work on high but nothing lower. When I checked a bit later I saw both fuses were blown. I've got a pesky parasite drain somewhere as my battery will be dead if I leave the battery cables connected all night. I can also see sparks when I connect the battery cable when nothing is turned on or no doors open. I must have a short somewhere.
I did the test with my multimeter with everything off I get a 12.4 v between the negative battery terminal and the cable. I've traced it as far as the big yellow wire running from the right side(+) of the starter relay on the fender to the ignition switch that is drawing voltage even when the switch is off.
Also, I noticed I had 2 fuses missing from my fuse box under the dash one was the heater(14A) and the other was courtesy lamps(14A). I put new fuses in thinking that was why my heater blower didn't work, even on high, and then it would work on high but nothing lower. When I checked a bit later I saw both fuses were blown. I've got a pesky parasite drain somewhere as my battery will be dead if I leave the battery cables connected all night. I can also see sparks when I connect the battery cable when nothing is turned on or no doors open. I must have a short somewhere.
I did the test with my multimeter with everything off I get a 12.4 v between the negative battery terminal and the cable. I've traced it as far as the big yellow wire running from the right side(+) of the starter relay on the fender to the ignition switch that is drawing voltage even when the switch is off.