ABS and P Brake light

[WrenchGuy]

O4 Tahoe, They just came on today. The ABS stays on during start up. The P Brake turns back on. I checked all the connectors and fumbled the P Brake to no avail. Anyone have this gremlin before? I can have a friend plug it in for me but if someone knows tonight?

 

[Rollin Thunder]

if the newer ones are any thing like my 99 i remember that would mean my brake fluid was low when the parking brake light came on, abs your gunna have to go to the dealer. or a prefired mechnic shop:thumbsup:

 

[WrenchGuy]

WTF!? I was just driving like an hour ago and everything was fine except the ABS an P brake light. I went out again and now its telling me to service tire monitor and my volt meter isn't working but there is no dimming or anything. This is weird. Its too late to be messing with this ****. I started it and the locks were locking and unlocking with one of the blinking lights during start up. WTF is goin on here?

 

[WrenchGuy]

I just went and metered it and I'm getting 14.3 still so... The alt is a little noisy and clicky (not loud at all) not bearing squeal or nothing but maybe brush noise or something. Couple more days the 300 is here so I hope it hangs in there. I'm gonna take me dash apart and look back there cuz I just had the CD player out today for new RCA's. Hmmm I forgot to mention that. But everything just started happening like hours after that though.

 

[WrenchGuy]

Well I went out and took the HU harness and unplugged it. Voltmeter works. Plug it back in and it's right back down to 0. Is there something fugged up in my cluster somewhere? Where JK when you need him....lol

 

[WrenchGuy]

Upon further research I found its my HU harness giving me the Brake lights and 0 voltmeter gauge. I dont get it it was working fine until today. I can hook the harness up and its fine. I hook up the buzzer to it (SCOSCHE) the brake indicator lights come back on and the voltmeter drops. Unplug it the meter goes up the lights turn off WTF. I cant turn the HU on either like the harness is not getting power. I checked the fuse too its good at the HU and under the hood.