Getting a P1494 error code on my 1999 grand cherokee laredo jeep I changed the gas filter a week ago but now the check engine light came on again. and it is the same code. looked it up and it says it is a detention switch vac leak What the heck is it talking about. and where is it located

Mike Butler

• 6674 Answers
• Posted on Feb 03, 2009

SOURCE: change a serpentine belt on 04 jeep grand cherokee laredo

Check this link & scroll down to your engine. Click on picture to expand.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528004328a

SOURCE: 2002 jeep cherokee laredo

My 98 Jeep Grand Cherokee had the same problem. Over heated when standing still. Took it to dealer and they could not find any problem with cooling fan. After doing my own investigation I found out that the electric cooling fan would begin to seize up after about 1hr. of operating. (gets hot)

The dealer would look at fan and see that it was running and think its ok. The problem is, it wasn't running fast enough.

I have a relay on the right side of front fender and jumped the fan to stay on with motor off. (must know what your doing). After about 1hr. fan started slowing way down. Returned it to dealer told them what the problem was. They were not smart enough to jump the relay so they put a couple hundred miles on it even though i told them it works OK when moving. Make sure you tell dealer to use the relay to jump.
Replace cooling fan motor. Works great

SOURCE: My sunroof is stuck open on my 1999 jeep grand cherokee laredo? Would it be a fuse? If so, how do you change it?

Definitely, you'll have to take a look to see if any obstruction is visible. To check the fuses first you'll need to find them. The fuse block cover should illustrate what each fuse is for. You can visibly check the fuses, with a flashlight. Just take a look at the sunroof fuse and check that its not burned. That the metal inside goes from one side to the other and its not burned or broken. You can use a test light or a multimeter, a test-light will do. I usually check them visibly, its obvious when you have a blown fuse just by looking at it. Its better just to pull out the suspected fuse to check it.

SOURCE: fuse box diagram for 1995 jeep grand cherokee laredo

look on the net that is where i got mine

SOURCE: How to install a brake light switch on a Grand Jeep Cherokee

Dont do it... It will take you bout 30 minutes to remove and replace it on the steering column