1997 Mazda B2300 Q&A
1997 Mazda B2300 Question: pcm burnt out?
ok i'll start by saying... it wont start... checked spark. nothing. checked fuel. nothing no psi. hmmm checked fuse PCM fuse blown. replaced that fuse along with a new fuel pump and filter. went to start, PCM fuse blows... replaced all my relays, new PCM fuse. BLOWS again! couple of weeks ago, my step dad use the truck to jump my moms car.. his dumbass puts them on the wrong way, but only for a sec.... but the truck still ran for a few weeks. then craped on me. i checked for burnt wires and found nothing.. im thinking its my PCM. - tvannetter
Wow, hooked the jumper up the wrong way. Big mistake. Could fry any electronics in either vehicle. If you can get a PCM cheap enough at a junkyard (recycled auto parts place), that may be the easiest way to see if the PCM is damaged, but if it's not you need to find out what really happened. You may have to get a wiring diagram, check power and ground at the PCM and also look for a short which could be blowing fuses. Very possible that the "accident" melted a power wire and shorted to ground a week or two later. I've seen it take a while for something like this to fail. Herer's a directory link if you want to find an auto electric shop to fix it. http://repairpal.com/directory?address=77396&car_brand_names=Mazda - Superbob