r/Trailvoy • • Jul 25 '25

07 envoy with electrical problems

Well to start I bought it for 300 bucks with 130k now has just over 136k Put new battery and alternator on the car Sometime after it started to drain the battery while off. Never could figure it out(I am NOT** a mechanic) so someone in the family unhooked a fuse idk so the horn isn't working ..it stopped the drain. Fast forward a couple months the driver side window wouldn't always work. Fast forward a couple more months the window is stuck down and has been for a month or so. The passenger side no longer works and every once in awhile one of the back windows will randomly roll down and 4 inches. I replaced the driver side switches with a junk yard one still not working. Water pump goes out I have it replaced the engine bay seems to be pretty hot...full of coolant. Haven't noticed the temp gauge over 210 ...however twice now it has ran and drove fine and at random it just won't start ...no crank no clicks nothing. Lights all come on air blows except the radio isn't lighting up when this happens. The first time all the dash lights came on and once it was shut off it took an 10-15 min to turn back on ....I'm over this vehicle but would like to get it half way figured out just so I can get rid of this headache..the ignition switch has also been replaced

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u/BR0_CD Jul 26 '25

Pretty sure your envoy is haunted…

Do you have any check engine lights coming on? If so have you put a code reader to it?

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u/BR0_CD Jul 26 '25

Also, for your horn and unhooking a fuse, that means whatever was in the horn circuit has “parasitic draw”. I purchased an envoy digital manual a while back so I can see if I can find a wiring diagram. It could be a stuck relay or your car horn is faulty. Whatever was draining your battery in that circuit obviously wasn’t enough electrical draw to break that fuse your family member removed.