it works by vacuum .if it is not working more often than not a vacuum hose is rotted. this one is hard to get at . it runs from the top of the engine to a round black ball down by the passenger front tire .start by finding the ball [a little bigger than a soft ball ]and trace the small hose back to the tee connector under the dog house [engine cover] i have used small gas hose and silicone and it works great.hope it helps and good luck.
On dash Switch that says vent heat, a/c defrost etc.
Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuated motors under the dash Check the operation of the selector switch Defrost is the default position for this system
Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuated motors Check the operation of the selector switch
fuse? switch? Selector?
defrost is the default mode. in most cases a vacuun leak is the culprit.
n ignition switch on a 1991 Chevrolet astro vanAnswern ignition switch on a 1991 Chevrolet astro van
check each door to see if switch is damaged or grounded Check headlamp switch
The 1997 Chevy Astro fuel relay switch is located on the firewall in the engine compartment. The fuel relay switch will be in the center of the firewall.
you can do somting
You lost the vacuume supply coming from the engine, defrost is the default mode if a mafunction in the vacuume supply is lost.
You will need to remove the ignition switch retaining ring in your 2002 Chevy Astro Van. Slide the ignition switch out. Remove the wiring harness from the end of the ignition switch. Reverse the process to install the new ignition switch.
under the dash on the passenger side
The 1999 Chevy Astro horn relay switch can be found on the back of the horn. The relay switch will be attached to the horn with two retaining screws.
You can remove the 2000 Chevrolet Astro Van the ignition switch cylinder by removing the retaining ring. The retaining ring will need to be turned to the left. The ignition switch cylinder will slide out.
To bypass the ignition switch on a 1994 Chevy Astro, simply attach a wire to the ignition switch where it makes contact after the key is turned on. Run the wire to the push button and install at the lower part of the ignition switch to send power to the starter. Ê
The 1987 Chevrolet Astro turn signal relay switch can be found beneath the drivers side dashboard. The turn signal relay switch will be above the gas pedal.
It is on the transmission, drivers side!
key switch tumbler removal on 1998 astro
It is a sensor usally in the drivers side head
get a new heater switch
It is quite simple to replace the four-way flasher relay switch in your 1986 Chevrolet Astro Van. The four-way flasher relay switch simply plugs in and out.
My 98 astro did this exact thing. I traced it to -believe it or not- the key switch on the rear hatch.
Square switch to the left of the steering wheel.