Where is the cruise control fuse located on 2005 chev trailblazer

in relation to the cruise control ????? There is no vacuum used for cruise control on your vehicle . Your vehicle has a computer controlled electronic throttle system .The powertrain control module (PCM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The PCM uses the throttle actuator control (TAC) module motor in order to control the vehicle speed. For further information on the TAC system, refer to Throttle Actuator Control (TAC) System Description . Your best bet , take it to a qualified repair shop. Need a factory or some other professional type scanner to check for codes an data input from the switches to the PCM

These fuses are all involved with your cruise control, one way or another. Do your brake lights work? Any applicable trouble codes?

Here is the fuse box diagrams for the 2 different engine options...and the 2 different box locations
Buick Rainer 2003 2006 fuse box diagram Auto Genius
HOWEVER ... I do not think there is an associated fuse for cruise control. That function is totally run from your on board computer (ECM). What can make the cruise not work is if any fault codes have occurred... Has your check engine light come on?
Some people with the same problem (that do not have an OBDll scanner to read or clear codes) disconnected their battery to reset the ECM. The cruise control then worked .... but if the root cause of the fault is not fixed ... then the same thing will likely happen again
Helpful?
Good luck with your troubleshooting

check cruise control fuse and check the brake lights see if brake light working because the brake light switch will deactivate cruise control when brakes is applied.if brake lights dont work either fuse blowed or switch bad.if all is good have vechicle code scan because cruise control control by PCM and vechicle speed sensor and thottle actuator control motor.

I would check the turn signal switch. The cruise and turn signal are on the same switch. The brake lights go through the switch before going to the brake lights. And the turn signals don't work with the ignition off.

Hi there,

As you have not stated the Model of Chev, nor the Year of Manufacture, I will give you some general possibilities:

* Blown fuse
* Short or open in Cruise Control circuit
* Faulty brake switch
* Leaking vaccuum circuit
* Faulty cruise control switch
* Faulty stepper motor
* Faulty transducer
* Faulty speed sensor
* Faulty cruise control module

As with all electrical circuits, you should first check the FUSE.

However, from experience, the most common cause of inoperative Cruise control are:

Brake pedal switch: check that tail lights illuminate when depressing the brake pedal. If not, then replace the brake pedal switch (located up on the brake pedal assembly).

Brake pressure switch: depending on which model Chev you have, there is an electrical switch (look for wires) screwed into the brake cylinder (attached to the brake booster). This switch is a cruise system backup from the pedal switch and measures brake fluid pressure, to disengage the cruise control. When this switch fails, the Cruise Control will not engage. If you have a multimetre, you can test the resistance on the switch terminals (ask Chev for the correct resistance spec) - if not to specification, then replace the switch.

Cruise control release valve: this is the alternative to the brake pressure switch and is also mounted on the brake pedal, above the brake switch. This switch is designed to disengage the cruise control, just like the pressure switch. If you have a multimetre, you can test the spec of this switch (ask Chev for the correct test procedure & specs) - if not to specification, then replace the switch.


NOTE: depending on the year of your vehicle, your local Chev Dealership will be able extract the Cruise Control fault codes, stored in the Cruise Control Computer. This is always the fastest (and cheapest) way to identify the suspected component and will eliminate unnecessary "trial and error" labor costs. This test cannot be done by your typical garage and must be entrusted to your Chev approved service agent only, who will have the correct Scan Tool.





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Gotta tell you, this question had me a little confused. Below are 2 wiring diagrams for you. One is for the cruise control circuit and the other is for the air conditioning circuit. The reason I gave you those is because it seems according to the wiring diagram in the cruise control that the fuse for the cruise control goes to the HVAC (air conditioning). According to the wiring diagram for the A/C yes that fuse also controls the ignition power for the A/C controller. In any case the fuse that would cover the cruise control is the number 30 fuse in the fuse panel located under the hood of the vehicle. Below is a picture of the location of the fuse panel and also fuse layout diagrams for the 6 cylinder and 8 cylinder engine vehicles as they have different layouts depending on the engine size. I hope this helps you and good luck.

Look in the owners manual. If you don't have one,how are you going to find fuses,relays,bulbs and know what check light are for?

Helm.Com- to buy one

Replace the brake light switch. It should be located near the top of the brake petal under the dash.

there is no cruise control fuse on a trailblazer. The codes need to be set. But there could be other issues also. With the TB, faulty cruise could be as a result of many other problems. Sorry