Question about 1991 Jeep Wrangler

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Where is the diagnostic connector located on a 1991 Jeep wrangler 2.5L? i want to check for codes.

The engine will turn over but will not start there is no spark at the coil wire and spark plug wire i use a spark plug tester no spark and i also use a screw driver and stuck it into the plug wire while cranking i didn't feel no shock to my hand while cranking what could be causing no spark?

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  • Jeep Master
  • 20,706 Answers

You asked 3 times
I deleted my response here so I can work your #1 asked
same quesions.
you posted 3 times, for one car failure
no start, dead spark ,dead ECU, dead, warning cluster, 100% dead, but cranks ok.
easy to fix with a meter.

Posted on Mar 06, 2017

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Posted on Jan 02, 2017

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1 Answer

No check engine light 98 wrangler


There are several things that could cause this problem - having a Diagnostic scan and code check should be the first step.
There are just too many things to check without that scan done - you could throw a lot of money at it and still be D.O.A.

Jan 25, 2014 | 1998 Jeep Wrangler

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1995 Jeep Wrangler 4.0L.. It has OBD 1... check engine light is not on but there is a code stored in the ECU aquired by 3 key turns... The code is 55... What is this?


55 Completion of diagnostic code display

It just says that it completed the diagnostic check (get one everytime you start your vehicle)

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1 Answer

How do I obtain and read the error codes on a 1991 Geo Tracker?


You must use a short jumper wire to ground the white diagnostic connector. This terminal is part of the Assembly Line Diagnostic Link (ALDL), located under the dash near the ECM. This is under the passenger side glove box behind the kick panel.

To activate the diagnostic codes, jump terminals 1 and 3 (the two outer terminals of the white connector). Then turn the ignition switch to on (engine not running). The check engine light will flash a code of 12 three times and then display the stored trouble codes.

To clear the codes, remove the ECM fuse for at least 10 seconds.

Mar 07, 2011 | 1991 Geo Tracker

1 Answer

Where is the oil sending unit located on a 1991 jeep wrangler 4 cylinder?


Under hood, driver side, lower engine area, front of distributor, mounted in engine block.

It looks looks this;




ledsled378_6.jpg

Nov 25, 2010 | 1991 Jeep Wrangler

1 Answer

My 1991 wrangler started overheating - i had the AC on and was stuck in traffic turned the heater on (ac off) and the temp returned to normal - where should i start?


You might check the fan,if it has a thermostatic clutch on it.
It should spin up with the same speed as the engine.And free wheel when the engine is first started. If it looks lazy,and just barely turning, in the heat of being stoped in traffic it may be whats causing the overheating.

Sep 18, 2010 | 1991 Jeep Wrangler

1 Answer

1989 jeep wrangler starts jumping and backfiring


Start with the basics...meaning check the spark plug wires and spark plugs. While under the hood, inspect all hoses for a vacuum leak(s). Then turn the ignition key on-off-on-off- on...leave in the on position and write down the number of flashes the check engine light indicates....2 flashes = #2....pause.....3 flashes = #3.
Let start from here. Are you able to perform engine repairs or diagnostics???

Jan 17, 2010 | 1989 Jeep Wrangler

2 Answers

Hard starting when cold ( engine cranks normally )


see if your engine has a ECT sensor (temp sensor that delivers information to your ECM) they are installed on the intake side of the cylinder head, it usually has 2 cables, have it checked replace if necesary

Nov 19, 2009 | 1991 Jeep Wrangler

2 Answers

I have a 1988 jeep cherokee, if your are standing in front of the vehicle, on the left fhand side, there is a relay center. well right beside that realy center is two little white plastic boxes with yellow...


Diagnostic Connector To read Diagnostic Trouble Codes (DTC's), the test connector for the electronic engine control system must be used. The test connector is more commonly referred to as the Data Link Connector (DLC). On all Jeep models through 1990, the DLC is a 6-pin and a 15-pin connector located under the hood on the right side of the engine compartment. On 1991–93 models, the DLC is located under the hood on the left side of the engine compartment near the powertrain control module. On 1994–98 vehicles, the DLC is located in the passenger compartment, under the driver side dashboard.

Data Link Connector (DLC) location — Jeep models through 1990

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Please don't forget to rate and let me know if this helped you.

Greg

Jul 11, 2009 | Jeep Grand Cherokee Cars & Trucks

1 Answer

1991 jeep wrangler, 2.5, manual. hesitates, and occasionaly misfi


So, when the engine is hot, it won't work. Do you have any idea what the ambient temperature is?
The causes might be 1) vapor lock; 2) percolation; or 3) PCV malfunctioning. This is all explained in a brief diagnostic article at
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_Hot.htm

May 25, 2009 | 1991 Jeep Wrangler

4 Answers

My 91 jeep won't start...


The Starter relay is bad.

May 05, 2009 | 1991 Jeep Wrangler

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