Question about 1999 Jeep Cherokee
Going through the factory manual I've noticed the fuse block has many
OPEN circuits when I checked mine some of these had fuses in them,some rated blocks had weaker or stronger fuses in them ? Now (with me messing with this)the CHECK ENGINE light came on showing my cooling fan code and tranny code. help me solve this?
Not really following your line of questions.
You can check to see if a circuit is hot by grounding a meter or test light and touching the positive lead to the fuses. You would have to go by the book as to the size of each fuse.
If you pull a fuse with the key on you can disable a circuit or system such as the cooling fan which would turn on the check engine light.
You would turn the light off by erasing the code with a scanner.
Posted on Jan 13, 2013
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Posted on Jan 02, 2017
A common problem on many of the new cars is that when a person gets gas, they don't tighten up the gas cap. This will turn on the check engine light. Did you get gas recently? Another option is to see what code is stored in the ECU that turned the light on. This is done with a scanner tool. If you do not have a scanner, then have a dealer look at it.
Posted on Nov 07, 2008
No its not true,the cooling fan comes on when the coolant temp reaches a certain point it closes the switch in the temp sensor wich in turn closes the relay and powers the cooling fan,the reason it comes on with the A/C is that it's wired to bypass the temp sensor and associated relay because the A/C compressor forces the motor to work harder and the coolant temp to rise significantly faster,the relay needs to be replaced or you will overheat the motor and possibly cause serious damage.
Posted on May 30, 2009
"No fuse" in the odometer means the IOD (ignition off draw) fuse is either missing or blown. It supplies power to the interior lights as well as memory functions of some modules while the key is off. It is to be removed for extended periods of storage so not to run the battery down.
Posted on Oct 31, 2009
Your engine computer is bad. It's a good thing that you mentioned about the check engine light dying also, as this is a classic sign of a bad ecm. I have repaired more than one of these Jeep computers, replacing the three power capacitors located inside the computer, and they have worked for years afterwards. If you don't have the skills or knowledge to repair the ecm, get yourself a rebuilt ecm unit and swap it out.
Posted on Sep 28, 2010
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