84 fieor-- 94 N* swap (Page 14/24) mcfrandon FEB 14, 09:28 AM Sounds simple enough.. Can i just run that fused power wire off the stud on the alternator or will I run into an issue? I guess i could use the starter too but i'd rather not. Im using the 2 heavy gauge wire positive battery terminal wire off the cadillac It looks that I have it wired up correctly except for the fact that the ICM clicks a bunch when I turn the key on and off Will FEB 14, 09:11 PM The wire that supplied hot at all times battery power to the Fiero ECM already runs from the junction block by the right strut tower to the stock ECM location. Don't dork with it, just connect it to the hot at all times input on the Caddy PCM. mcfrandon FEB 15, 12:52 PM i dont have that wire or the junction block. 84s didnt have them as far as i can find mcfrandon FEB 15, 09:13 PM I have the main battery feed wire running off the starter terminal like it was originally but with a 30 amp fuse instead of fuse able link. I kept the factory fuel pump wiring once i figured it out. I dont know what it was but one thing i thought i wouldn't have to worry about would be the clutch and shifting. After I finally got the new clutch pedal in and had what seemed like a good pedal it still wouldnt go into gear when it was running. Turns out i did have the master banjo upside down but that only helped a little bit. After running it with the tires in the air and shifting thru the gears it became a lot easier. I pulled the car out so i could flush the engine coolant passages and radiator so i dont get plugged up. Now I need to put the coolant lines up and make sure the gauge and fans operate properly. On the wiring diagram i have, it doesnt say which wire is coolant fan high or low at the C500 just says coolant fan, and I know some guys are using the caddy pcm to control when the fan kicks on Will FEB 16, 07:10 PM The '85 and later cars had the C500 in front of the right strut tower right next to the junction block. '84's had the C500 in the middle of the firewall... not sure where their junction blocks were. A two speed fan was optional on the '88 four cylinder cars. Every other Fiero had a single speed fan. I think I hooked mine up to the low speed fan output on the Caddy. mcfrandon FEB 17, 08:15 PM hmm yeah im stuck on getting the fan to turn on. As far as I have read the 84s have a 2speed fan if they have AC which mine does. just not sure how they wire up or if mine even works. hunting for a diagram right now IXSLR8 FEB 18, 02:03 AM I suspect that you have two fan relays: one for the low side and one for the high side of your 84 coolant fan. You can probably run your ECU high and low fan wires to each appropriate relay. Both need to be hooked up or you will throw a code. Say you only use the high side like I did (one speed fan). You will have to plumb in an extra relay for the low side wire so your computer won't throw a code. mcfrandon FEB 18, 02:09 AM got the cooling fan deal figured out. After decoding the fan wiring diagram here:http://images.fieroforum.com/pffimages2/84fanground.JPG I finally understood the relay was bad. luckily I had snagged one off my other 84 a while back and just had it sitting in this car. I guess they are hard to find. Set it up to use the caddy low and high speed fan controls. now i just have to wrap it up, try to make it look nice, and add coolant mcfrandon FEB 18, 03:19 PM what are you guys doing for the park/neutral ecu pin Will FEB 22, 04:06 PM quote Originally posted by mcfrandon: what are you guys doing for the park/neutral ecu pin I addressed that by not running the Caddy computer.