Chevy8697
OBS Enthusiast
Hi all so i need a little help diagnosing an issue with my brothers truck. About a month ago we installed theft alarms in our trucks. His is a 98 k1500 with passlock mine a 97 without.. both installs worked fine minus remote start for his because we need a module. Anyways. Yesterday on his way home from work he started his truck and was idling when he when to drive the truck shutoff. He tried to restart it and had power to nothing. no headlights no radio nothing. Today we took a quick look at it. What we saw was the following. when the key is in accessory position the radio does work but if we hit the brake peddle or hit door locks or anything that uses power it kills what power the truck does have. If we hit the 4way button it starts to cycle all sorts of relays under the dash but not the 4ways. we have disconnected the car alarm to try and eliminate anything recently done to the wiring but nothing changed. also if you would turn the key to 2/3 forward the gear indicator will come on but when the key is turned to the start/run position it goes away the gauges move when in run postion but we have no dash lights.. the cigarette lighter has power but whenever the relays would randomly go off it would cut power to it. I didn't get to check any of the power leads with a voltmeter but there is power to the vehicle. all battery connections are good and the battery started my truck this morning. The door locks somewhat work but cannot fully unlock/lock by them self. The windows will not move at all. So could this be a issue related to passlock? Or could it be the power block under the dash that is held together with a bolt? Or could it be the whole ignition switch? Also when the column is unlocked i can remove it from park without hitting the brake peddle last time i did anything to his truck i know i had to use the brake to get it out of park. IF anyone could shed some light on this or have anything else that could be the problem please let me know. Thanks everyone!
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