Re: I Have A 2001 Mercury Sable. When I activate the...
If and only if the cruse control's are located on the directional switch arm, try replacing it. If this dose not fix it , your looking at a lot of money to track down what is the cause, only a deal will touch that and its not somthing you want to go trying to do your self if you dont have wireing experance. An after market shop may mess with it but you will pay hell with the come back's.
1. get use to not useing the cruse control, it eats up more gas anyway if you have it going for less than a 100 mile trip.
2. get a stick, cut it to just the right hight and wedge it betwen the gas pedil and the seat, hehehe im just kidding
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Check for applicable trouble codes, relating to cruise, see if that points us in the right direction?
Make sure the brake lites, work.
Other than that, about all I can tell you is to look up the wiring diagram for cruise control, check voltage and ground circuits.
You are right that it could be either component, or something else electrical. The security system will kill the fuel system if the wrong key is used or the system is acting up. A mechanic would check base fuel pressure with a gauge and also see if the pump is getting power from the relay when it fails to start.
Do you have cruise control,see if that cable somehow is giving slack,This is a problem with Hyundai where the cable affects TPS plausibility,There was a TSB bulletin by Hyundai Engine RPM fluctuation - cruise control cable adjustment procedure
There are numerous things that can cause this. A fuse, a vacuum leak, a bad switch in the steering column. The switch in the steering column is usually the culprit but is also the hardest and most expensive to change. Best way to find out is to plug it into a computer and see if it reveals any trouble codes. Also of the many things that can go wrong outside of replacing the servo controller. Check the servo deactivation switch. Located on the brake pedal arm under he dash. This will require you to remove the black plastic duct fot shield to expose the under dash area. It only has 4 plastic speed grommets. You will see to switches on this brake arm. The lower one activates the brake lights. The upper one deactivates the cruise control and is a common failure in 1998-2002 Ford mercury Crown Vics and Marquis. Remove the connector(also known as connector c223), and check the continuity of the switch opened or closed. It should change from infinite to a short using a standard voltage meter set to ohms or continuity and pushing the brake pedal. Also Fuse number 1 (15amp blue fuse) located there under the dash as well, is the primary fuse for the cruise control servo. In most cases you will see this ok
Please try this first, either go to a local wrecking yard or to car-parts.com and buy a cruise control module. Replace it and see if that solves your problem, I hope it will and thing it will. Good Luck and Merry Christmas, I am assuming you know how to check your fuses correctly.