Hello all, I have a 1986 Jeep Grand Cherokee and have a check engine light on which is letting me not pass smog, does anyone know how to diagnose this check engine light??? or know any ways I can pass smog without having to diagnose it as a last resort?
thanks
Charlie

 

if its OBD1 the just turn the key to the on position and back off 3 time the last time leave it at the on position and it will flash each flash represents a number they will be in pairs with pauses in between the longer pause represents a new number then just search to find the chart that tells you whats what and if its OBDII then take it to autozone or advance or whatever and they can plug it in and read the codes for you then just fix whatever may be wrong

 

sorry didnt read that its a 1986 but that means its OBDI so do the first part

 

thanks, I also heard that you jump a couple wires under that dash..??

 

86 Grand? I thought 93 was the first year of the Grand Cherokee.

 

yes it is a grand as it says on the title

 

i have a 93 grand i thought was first year but idk
also idk anything about using wires under the dash for anything unless your refering to OBDII which is where you would have to have it plugged in but yours is too old for that

 

86 grand would be a FSJ grand waggy.

got a pic?

 

it is actually the car that my parents bought new when I was two and they have still had it, it is being towed to my house this weekend, Ill get a pic up as soon as I get it.

 

It must be a FSJ. They DID NOT make a ZJ/Grand Cherokee before 1993.

 

X2. They made a Grand in '86 but it was a Wagoneer.

 

Nice! I would love to have one of those as a tow rig.

 

yeaaaaahhhh but i wouldn't kill it using it as a tow rig tho. i'd likely drive that less than my trail rig.

 

I have a 91.... I bought it for a tow rig... but the fuel milage is soooo awful, I am probably going to use my ZJ for it...


And if it a 86 FSJ its not OBD-I...The check engine light is a like a Renix XJ.. not really a Check Engine light. but an Emissions timer light. Unplug the timer and it goes away.

 

It's GLOOOOOOOORIOUS!