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98 blazer numerous electrical problems

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Old Mar 21, 2011 | 09:23 PM
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Default 98 blazer numerous electrical problems

I want to start off by saying this is a great forum. I've found alot of information thats helped me out.

But now I'm to the point that i've got problems i cant quite figure out where to look next.

But the first is the rear glass release. It'll open from the switch on the dash i can go to the lock on the rear hatch with the key, lock and unlock all locks but when i press it. it wont pop the glass and rear hatch is good already pulled panel and checked switch power is going through switch but not getting to solinoid

Second problem is dome lights will never go off unless i keep them off by the dome override, already checked all door jamb switchs all are good but i noticed while retesting the switches on the vehichle hooked to wiring with my old analog voltmeter on cotinunity/resistance setting. the needle would drop about a 1/4 sweep but wouldn't drop to 0 on any of the switches while hooked to wiring but they would 0 out unhooked.

Last problem the power mirrors dont work dont know if they have power or not couldn't find a wiring diagram for them.

Also its still all factory none of the wiring has been cut up
 

Last edited by jeff's98blazer; Mar 21, 2011 at 09:28 PM.
Old Mar 22, 2011 | 07:54 PM
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ok i've got the power windows working. The switch had a bad connection I took the switch apart and cleaned up the contacts and works great. But still haven't figured out dome light and rear hatch.
 
Old Mar 23, 2011 | 12:02 PM
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From the schematic, it appears that the switch out back runs through the driver door lock actuator which locks which then powers the window release actuator. The switch inside interfaces with the BCM (or TBC as it shows in the schematic) which then energizes the relay.

I was able to find the diagnostic chart showing your condition as well.
 
Attached Thumbnails 98 blazer numerous electrical problems-98_tailgate_sch.gif   98 blazer numerous electrical problems-lift_window_lock_switch_inop_1of2.gif   98 blazer numerous electrical problems-lift_window_lock_switch_inop_2of2.gif  
Old Mar 28, 2011 | 12:29 PM
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In step 5 it says to ground BLK/WHT in door lock cylinder switch LH. Does that mean the switch is in the driver door because there is no BLK/WHT wire in rear hatch except at the glass actuator?
 
Old Mar 28, 2011 | 12:38 PM
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Yes it is in the door.
 
Old Mar 28, 2011 | 01:05 PM
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That really sucks. Have to wait for the rain to stop.

Thanks for the help
 
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