99 1500 ZR1 electrical?
airboss20
05-24-2016, 11:26 PM
I did a search and didn't find exactly what I was looking for. I have a 1999 1500 ZR1 that has become a bit cantankerous.
A while ago the service 4WD light appeared on the dash, but before I could take care of that, I started having intermittent starting issues. From cold it will simetimes start without issue, other times it will do nothing. I turn the key and all dash lights operate normally and also at normal brightness and the voltmeter in dash is reading 12v from the battery. When I turn the key to the start position..... nothing. The lights in the dash cut out as normal and return when the switch returns to the run position. There is no click from the solenoid or activation of the starter.
Other times it will start with absolutely no issue.
Also of note, the push button 4WD will also engage and disengage intermittently.
Thoughts that run through my mind that link these issues may be the gear position sensor on the side of the transmission. Maybe the 4WD and starter will not engage if it is not reading park or neutral?
I am at a loss, and would rather not just throw parts at it.
Thoughts? Ideas?
A while ago the service 4WD light appeared on the dash, but before I could take care of that, I started having intermittent starting issues. From cold it will simetimes start without issue, other times it will do nothing. I turn the key and all dash lights operate normally and also at normal brightness and the voltmeter in dash is reading 12v from the battery. When I turn the key to the start position..... nothing. The lights in the dash cut out as normal and return when the switch returns to the run position. There is no click from the solenoid or activation of the starter.
Other times it will start with absolutely no issue.
Also of note, the push button 4WD will also engage and disengage intermittently.
Thoughts that run through my mind that link these issues may be the gear position sensor on the side of the transmission. Maybe the 4WD and starter will not engage if it is not reading park or neutral?
I am at a loss, and would rather not just throw parts at it.
Thoughts? Ideas?
airboss20
05-25-2016, 06:23 AM
I was a little tired when I wrote the thread. It's a Z-71.
gmtech1
05-27-2016, 10:54 AM
Make sure you battery cables are clean at tight, also good connections at the starter and battery ground. May have a failing stater also. A '99 in New York probably has a bit of corrosion on some things. The two may or may not be related. I'd focus on the starting issue first.
airboss20
05-27-2016, 11:30 AM
Did a little more digging. I have confirmed that all battery connections are tight. The crank fuse is good, but when the key is turned to the start position it is not activating the starter relay under the hood. I left the key in the run position and jumped the relay manually. The starter cranked and the engine turned and then died out right away. Does this mean we have a security issue?
j cAT
05-27-2016, 05:26 PM
Did a little more digging. I have confirmed that all battery connections are tight. The crank fuse is good, but when the key is turned to the start position it is not activating the starter relay under the hood. I left the key in the run position and jumped the relay manually. The starter cranked and the engine turned and then died out right away. Does this mean we have a security issue?
no . the security issue you get it to crank it may start then quickly stall that is the security issue which does happen..
when you place the key to crank and the starter relay does not engage I would look to the ignition switch as the cause.
the vehicle if with aftermarket wiring [alarm system etc] can cause these type issues as well as the ignition switch . use a meter to check for proper voltage at the starter relay ..
forcing the starter relay to energize [not jumping the contacts] does it continue to crank ?
battery connections must be removed wire brushed cleaned , then re-installed.
no . the security issue you get it to crank it may start then quickly stall that is the security issue which does happen..
when you place the key to crank and the starter relay does not engage I would look to the ignition switch as the cause.
the vehicle if with aftermarket wiring [alarm system etc] can cause these type issues as well as the ignition switch . use a meter to check for proper voltage at the starter relay ..
forcing the starter relay to energize [not jumping the contacts] does it continue to crank ?
battery connections must be removed wire brushed cleaned , then re-installed.
airboss20
06-09-2016, 07:47 AM
Brand new battery, connections good. New gear position switch. No voltage to the starter relay at the fuse box under hood when key moved to crank position. No aftermarket alarm or security system.
777stickman
06-09-2016, 09:03 AM
Check IGN A fuse #6 in underhood fuse block.
airboss20
06-11-2016, 05:56 AM
All fuses under hood and in the cab are good.
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