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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


 
 
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Old 08-03-2014, 05:03 AM   #1
240Lover770
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Exclamation Relay madness need help.

so i was trying to keep from posting but im irritated and tired at the moment and ive probably googled myself to death. so i would like some help from zilvia. i apologize for the lengthy post. car is a 92 SR'D hatch

My issue: a few weeks back i decided to use the 2nd fan for more cooling on my flex a light setup. ran good for about 2 weeks then it fried a blue relay. even the female end was a little burnt. at the time it happened i was on the way to work and had to pull over because i noticed the car over heated. used a spare relay and got to work. fast forward i bought an equivalent(not oem) relay from the parts store and plugged it in. it fried that relay within 10 min of driving.
so i switched back to the oem blue relay..car was fine. fast forward a day> im riding home from work one night and realize my cluster lights are a little dim. no biggie i keep driving. right when i pull into the drive way,the cluster pretty much goes suuuuuuper dim. all lights are barely on at this point and the car struggling to stay on. i shut it off and try to start it again, it tried to turn over but didnt do any full revolutions so to speak. i unhook the battery then hook it back up. all lights are bright again PFC read 10.8v for battery voltage. tried to start again. it wanted to turn over but didnt. heres another kicker...pulled the key out and my pfc stayed on along with the accessory lights on the cluster. i also noticed the check engine light blinking. the seatbelts also went back and fourth like the car was fully on. at this point i gave up and unhooked the battery and called it a night.
next day i get the battery fully charged and checked at the auto store and bring it home. hooked everything up and car ran first startup. i brought up the voltage on the commander and it read 11.9. so i took it out for a drive and decided to head back to the parts store to get the alternator checked. pulled in the lot and pulled the key out....PFC commander and accessory lights were still on..smh so i hurry up and start the car and drive back home. while driving i noticed the voltage kept dropping. by the time i got home i was at 10.8v.

soo i parked and pulled the key out and pulled the big 75A fuse then the EGI relay and put them back. everything was fine except the EGI relay. as soon as the plug touched the female end it clicked. i did it a few times to see and every time it clicked. i checked all wired under the relay box and checked alternator wires. they all looked fine. looked at the ecu wires,they all were fine.

so i guess ive narrowed it down to the EGI relay. what exactly is causing it to keep clicking to where the PFC stays on? whats causing the accessory lights to stay on? and whats draining my battery and causing it not to keep a charge besides the maybe the alternator?

3problems in one basically. any advise or help will be appreciated. let me know if you need more details on something.
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