1994 GMC YUKON > electrical shuts off motor! Motor runs bad but runs until you step on the brake or turn on the head lights. HELP

THE CAR HAS LIKE 50+ ELECTRICS DEVICES,
ONE IS HEAD LAMPS THAT WORK KEY OFF DO THEY
IF NOT FIX DEAD HEAD LAMPS FIRST. FUSES.
IS STATER MOTOR DEAD
IS ENGINE DEAD
IS TRANSMISSION DEAD (ENGINE RUNS)
DOES DASH HEATER BLOWER WORK
DOME LIGHTS DEAD?
BRAKE LAMPS DEAD
TURNS DEAD
PARK LAMPS FRONT AND REAR AND SIDES DEAD/.
SEE, HOW COMPLEX 12DC POWER IS? AND MORE LOTS MORE. EVEN A DEAD RADIO

Do you know how to do automotive electrical testing ? Videos on youtube showing how to do it . Does your Yukon have manual or automatic Heater/AC system ? Could be the blower motor is bad , blower motor control module (if automatic ) Do you hear the blower motor running ? 2005 Chevrolet Tahoe Blower Not Working Chevy GMC same thing

posible blower resystor and relay is all une piece mounted nes blower motor

most electrical problems are caused by bad grounds, get a dvom( digital volt ohm meter) and check continuity on your tailight and headlight wiring

the ebcm is bad, contact absfixer.com

Your ABS actuator pump is running ... needs to be checked by certified mechanic

Blower Motor Removal & Installation Delphi
Blower Motor Replacement (Delphi)


To Remove:

1. Remove the instrument panel sound insulator panel (if equipped).
2. Disconnect the electrical connector from the blower motor.
3. Remove the blower motor insulating cover screws.
4. Remove the blower motor insulating cover.
5. Pull the retaining tab down and rotate blower motor counterclockwise to remove.

To Install:

1. Position the blower motor and turn assembly clockwise until tab locks in place.
2. Install the blower motor insulating cover.
3. Connect the electrical connector to the blower motor.
4. Install the instrument panel sound insulator panel (if equipped).

Visteon

Blower Motor Replacement (Visteon)


To Remove:

1. Remove the instrument panel sound insulator panel (if equipped).
2. Disconnect the electrical connector from the blower motor.
3. Remove the blower motor screws.
4. Remove the blower motor from the HVAC module.

To Install:

1. Position the blower motor and install mounting screws.
2. Connect the electrical connector to the blower motor.
3. Install the instrument panel sound insulator panel (if equipped).

You have a bad ground connection at the rear light cluster Remove and clean them.Make sure all wires are connected.Hope that helps pippall.

Sounds like you either have a bad headlight switch or a bad relay under the hood. Also you might want to try turning the lights on for a minute without the motor running,if they work with motor off then its probably the headlight switch.

i serviced my 2004 yukon for abs light came on they told me it was the right front abs speed sensor wire , which is sold sepratly or with wheel hub cost$ 300 or 57$ for just sensor wire, i did all brakes changed sensor and for awhile the stayed off but comes on and at about 20 mph it turns off ?