Mazda B2500 No Blower, No Blinkers, ABS light, Airbag Light on Cold Startup

techjerm · #1 11-28-2011, 08:06 AM

Hey all - I've got a 2000 Mazda B2500. When it gets cold here (lol, 65 degrees is cold in south Texas), I've got a weird electrical problem. Normally, when I start the truck, the ABS and Airbag lights come on for a short time, then go off. When the temperature drops, the lights don't go off (so I'm assuming these systems are not powered up), my turn signals don't work, and my a/c blower motor doesn't work. I've searched my repair manual (but I can't find any common ground or relay or fuse in my non-specific Haynes repair manual)... so the last resort is to beg for help! After the truck warms up, everything works fine. Any suggestions I can look for? Is there some module or relay that powers up these systems?

Thanks in advance!

SalRanger2 · #2 11-28-2011, 07:45 PM

check the trucks owners manual, should be listed for the fuses function and number

NERanger · #3 02-27-2012, 06:54 AM

I've been having the same exact problem in my 1990 2.3L ranger. It's very frustrating. It only seems to manifest itself on cool (50°F or so) days when the air is thick with moisture, but not in the rain. I checked all the fuses under the dash, they look clean. I replaced the fuses in the power distribution box up under the hood as well.

Mechanic diagnosed the problem as a bad alternator and replaced it. I didn't have problems for a few weeks then it just came out of nowhere on a cold start. Drove it up to his shop to reproduce the problem for him, and it started up just fine.

It has been about a week and it has not reproduced the problem yet.

Anyway, I just replaced the ignition switch, and there was a little bit of gunk building up on some of the connectors. Other than that switch, I couldn't see any commonalities between the ABS, blower motor and turn signals based on the wiring diagrams in the manual.

Any advice would be appreciated!

NERanger · #4 03-12-2012, 07:17 PM

While I am sorry to resurrect such an old thread again, I believe I have found the problem in my truck that was exhibiting these symptoms!

With some help, the common denominator was found to be the ignition switch. I took apart my steering column and removed my old switch, and replaced it with a new one (easy job, only took 15 mins or so!). The old one had some smegma in the electrical contacts, and may have been a little out of adjustment, as the problem only seemed to occur when using my spare set of keys.

Hope that helps!