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1996 GMC Yukon - Page 4 Questions & Answers
No brake light
check the switch under the brake pedal they uaselly stop working after a while and just buy another and put it on also check your fuses first and to see if u have any burnt out bulbs
Four wheel drine willnot work front end making
Fuse is located at the end of eh dash on drivers side and the Actuator
is located at the front differential and on the passenger side.
When in 4wd mode, a switch on top of the transfer case conducts
12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it
conducts to the light blue wire (#900) to the actuator.
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator.
Check
voltage at the connector for the front actuator (at the front
differential - it looks like a large bullet that threads into the front
diff.) If it has 12 volts, the actuator is the problem. If it does not
have 12 volts, check the transfer case switch and the power feed to the
transfer case.
I'll assume it is the actuator, if the plug to the actuator is getting 12 volts when in 4wd.
The
way this actuator works, is it is a sealed chamber that gets heated by
voltage. When it heats, the pin in the end swells and pushes a shift
fork in the front differential. The shift fork engages a spline on the
passenger side of the differential, and boom! you have 4WD.
GM
offered an upgrade to this actuator that is a motor instead of a heated
device. However, it requires a small harness addition, a spacer, and a
new actuator. It is about a $150 to $200 option.
Good luck. The
actuator is usually the problem 90% of time but recheck all of the wire
harness just to maker sure there is no short before replacing any
parts. The actuator may not be fully engaged or disengaged and the fork
to the spline may be what is causing the grinding.
88-UP C/K ACTUATOR UPGRADE
VEHICLE SERVICED: 88-99 CHEVROLET FULL SIZE
PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND
COMPONENT RELIABILITY.
SYMPTOMS: NO FRONT DRIVE AXLE ENGAGEMENT WHEN SHIFTED INTO 4X4.
Obtain the following GM part numbers:
(1) 26060073 Actuator
(1) 88959465 Harness/Spacer Kit
Turns over but won't start after it sits for a day
I had a similar problem caused by humidity and a short in the distributor cap so replaced the distributor cap and rotor. Problem solved. Don't buy discount branded parts or you will have the same problem again in a few weeks. Really cheap price equals really cheap parts that will fail early.
98 Chevy K1500 that the daytime running lights
Sounds almost too simple but have you checked the wiring to the parking brake. If it is depressed enough to light the brake light in the dash the DRL's will not light or if the wires are not hooked up same problem. You also state you have checked the control board under the dash I assume you are talking about the Diode an aluminium finned box a little bit larger than a deck of playing cards under the dash on the right side of the steering colum at the swell in the dash. remove this diode and insert a shunt in the connector and see if those babies light up if so its the diode
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