When switch is turned, car does not come on, headlightsm come on, horn blows, blinkers comes on and tac moves up, check engine light comes on, and 4 way flashers. can you please tell me the problem with this?
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I'm an electrical engineer, I checked the electrical diagrams and verified that there is no problem in the rear lamp assembly or wiring. With the light assembly unplugged, I can actually watch the blinker and brake signals operate with a voltmeter. The Tail light works OK.
It simply won't provide enough current to light the bulbs.
I'm afraid that it's melted one of a pair of normally closed contacts inside the blinker switch that feed the brake and turn separately on each side.
This is a challenging repair but you can do it yourself if you are comfortable with the following instructions. For tools, you will need a voltmeter, a set of allen wrench screw drivers and a set of wrenches. The horn on a Chevy Tahoe operates with the use of a relay. This means that the power for the horn is received from the fuse block under the hood. Power from the fuse block runs to the horn relay. The commonly open end of the wire goes to the horn. The horn is then grounded to the frame. Power to the activating terminal of the relay comes from the Body Ride Control or from the accessory side of the ignition switch. The negative side of the relay runs through the column to the clockspring. The clockspring is also used for the air bag system. The wire then continues to the steering wheel air bag where it is attached. As the air bag is pressed, it causes the wire to ground, actuating the relay which, in turn, activates the horn.
Sounds like you have an electrical problem. Your truck should have a 4l60E in it, which is controlled by the PCM. If the speed signal is missing it will shift poorly and at the wrong times. Check the connection and wires at the vehicle speed sensor on the drivers side of the tailshaft housing. If this is something that started occurring after the the transmission was replaced look for pinched wires or other damage to the wires that may have been done during the installation. I've seen some sloppy transmission shops damage things or leave stuff loose so just go over everything.
Next time it does it push on the flasher switch the blinkers use the same flasher if it quit the flasher switch is bad. Alot of GM products have had this problem and alot of them have recalls take it to a dealer and ask if yours has a recall for this even if it is out of warranty some recalls apply
It doesn't blow cold air? Doesn't come on at all? What's the problem? If it doesn't blow cold after a charge, it leaks. Either on the compressor or in a line or both. To start at the dealer, a compressor is about $1200. That's what they told me. I have two leaks. You can buy remanufactured compressor on ebay for under $200. Or find a good shop (polar bear around here) with reasonable prices and have them do it for something in between.
If it no air is moved at all by your climate control system, the blower motor could be fried, the switch may have gone bad or a fuse is blown perhaps. If it moves air, but not cold air, recharge it and see if it stays cold. If so, great! If not, find the leak.