Idiot Cluster Question
#1
Junior Member
Thread Starter
Join Date: Nov 2012
Location: NorthWEST!
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Idiot Cluster Question
Im having issues with my idiot cluster, the lights don't come on in the test phase with the ignition on but the engine not running. I have re-soldered both the CPU and the Cluster itself and it work for about 20 minutes after I put the CPU back in. The horn and key/lights on beep still work. So im lost now anyone have any ideas?
#2
Junior Member
Thread Starter
Join Date: Nov 2012
Location: NorthWEST!
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Update. It seems that the CPU I have is messed up and shorting its self out. When sitting it drains all its battery, and when running the alternator cant keep up and it wont charge the battery. I have had the alternator bench tested and it passed both times. Does anyone have any ideas on this? The CPU is out of my 88 so I have the original one still, Im going to put it back in tomorrow and see if that fixes it, but it needs re-soldered too.
#3
Moderator
iTrader: (1)
W/key to on and the engine off the White/Black wire in the 7 wire CPU plug should have a ground on it. If it does not then the idiot lights will not light up. You can jumper a ground to this pin and see if that changes anything or you could measure the voltage on this wire and it should be close to 0 volts (usually it is 1 to 2 volts or so but definitely not 12 volts). The W/B wire comes from the alternator and if the voltage is high (close to 12 volts) w/key to on and the engine not running then there is a problem w/the alternator or the wire in question is receiving voltage from coming in contact w/another wire that has voltage. The Meter fuse also needs to be good for the lights to turn on. If voltage is placed on the Y/L wire in this CPU plug then the lights should turn on. The other possibility is if the Black wire in the CPU plug, which is a ground, is not doing its job as this is another cause for the lights to not turn on when they should.
Thread
Thread Starter
Forum
Replies
Last Post
ls1swap
3rd Generation Specific (1993-2002)
15
09-08-15 05:30 PM
Nosferatu
2nd Generation Specific (1986-1992)
7
09-05-15 02:13 PM