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I replaced the blower switch and the resister and the I think the relay and all of the actuators and still no blower I know I am missing something but running into stone walls and trying to find locations of how everything is routed to is impossible cus everything is routed it taken to and is routed all schematics that I find and diagrams that I find are for like Silverados and other vehicles like the suburbans but trying to find something on a Tahoe is next to impossible because at least me to other vehicles and set most of the schematics I find are for Silverados and suburbs but not for mine and trying to find an exact schematic and locations of everything damn near impossible I'm ripping the whole dash apart just to figure this whole system out and how it's running it's just the whole nightmare to me trying to find information that will lead to what my problems
I replaced all the actuators the dash switches all replace brand new resistor on top of the heater box replace what I thought was a relay to sitting right next to the resistor and I still have no blower I can run direct power to the blower and it works on a switch but to hook it up to the switch in the dash still have no power
I replaced the dash switches I replaced the resistor at the top of the heating box I replace what looks like a relay right next to it and I still have no blower control when I switched the switch on the dash it will not for a while power to the lower but I can run a hot wire to the blower and get the blower to work on a switch from a simple direct line to the fuse box and running it with a 20 amp switch on a 20 amp fuse I have replaced everything I think in the heating system but I'm thinking I'm missing something and all the schematics I pull up for the 99 Tahoe everything leads me to suburbans and Silverados but the schematics don't show exactly where everything is at or my system even and trying to find anything on it is next to impossible so I know I'm missing something but I just can't find it
I had replaced the main switches in the dash controls are all brand new I went through and replaced the resistor on top of the heating box and next to it is sitting some kind of relay and I replaced that too and also replaced all the actuators that operates the doors for the cooling and heating I have heat but no blowers still not totally fixed only partially because the blower fan does not work on the main switch so I had run a hot wire to the blower and I can get the blower to work on a hot wire to the fuse box running on a 20 amp fuse and a 20 amp switch however still can't use the main controls to operate the blower and no power coming out of the switch or is being blocked somewhere in the system and I can't find it
I have a 99 Tahoe LT k 1500 four-door four-wheel drive I had replaced the main switches in the dash brand new all the actuators on the heating system are brand new the resistor on top of the heating box are replaced too and what's next to it look like a relay of some kind but I replace that too I still having problems with my blower for some reason when I switch the new switch on the dash on the blower it does not work I can run a hot wire on a 20 amp fuse to the blower on a 20 amp switch and get it to work but trying to work to switch in the dash there's a blockage in the system and somewhere it's screwing with my systems and I still have no blower fan for heat
What does the connector that plugs into the blower switch at the control panel look like? Jiggle it around and see if the blower responds.
no power at fan
Start tracing back, any power at relay? From memory relay should be behind glove box. look at the wiring diagram above and you can see which wires should have power and when.
