Question about 1988 Jeep Wrangler

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1988 jeep wrangler no fuel

1988 jeep wrangler 2.5 L TBI inline fuel filter out turn key no fuel at plug to fuel pump orange wire .6 volt brown 7.6 volts is it fuel pump or sensor

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  • terntob Jan 03, 2009

    mymy 1988 jeep wrangler loses power when going up a hillk, i have had the
    fuel poukmp repolaced, plugs, wires cap still can't make it up a hill


  • Anonymous Mar 17, 2014

    My 1995 Jeep Wrangler only Cranks before and after I cahnged the fuel pump

  • Anonymous Mar 23, 2014

    What should the fuel pressure be at?

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  • 421 Answers

Check your fuel pump relay and your ignition switch those numbers you gave for voltage are not right, please recheck that you have a ground and 12volts at the pump while cranking please rate -jeff

Posted on Sep 04, 2008

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2006 jeep wont start


You did a good starting of troubleshoot, now you need to find out WHY. There is a wire touching and providing feedback into the Electrical System

Apr 09, 2013 | 2006 Jeep Wrangler

Tip

Trailer Wiring Cheat Sheet


Hello all,

For those of you that have or occasionally borrow trailers and look at the wiring plugs with disdain (I mean face it they don't make sense, grd is white, +12vdc is black, etc), this is for you.

Plug Types/Application
7 Way - RV Trailers, Horse and Utility Trailers
6 Way - Horse, Stock and Utility
4 Way - Utility Trailers

Columns are: Color, Function, Mark on the plug.

Seven wire Trailer plugs:

Horse, stock or utility trailers:

White = Ground - 1
Blue = Electric Brakes - 2
Brown = Tail and clearance lights - 3
Black = Battery, aux power - 4
Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7

Recreational Vehicle:
White = Ground - 1
Blue = Electric Brakes - 2
Green = Tail and clearance lights - 3
Black = Battery, aux power - 4
Red = Left turn/Brake - 5
Brown = Right turn Brake - 6
Yellow = Auxilliary or Reverse - 7


Six wire trailer plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery, aux power - A
Blue = Electric Brakes - S

Recreational Vehicle: (color, use, plug mark)
White = Ground - GD
Yellow = Not used -
Brown = Right turn Brake - RT
Green = Tail and clearance lights -TM
Black = Battery, aux power - A
Red = Left turn/Brake - LT
Blue = Electric Brakes - S


Four wire plugs:
White = Ground
Yellow = Left turn/Brake
Green = Right turn Brake
Brown = Tail and clearance lights


Ground should be 10ga.
Others 14 ga

Best regards
Mike

on Sep 19, 2009 | 1987 Jeep Wrangler

1 Answer

Looking for wiring diagram of plug to map sensor on 03 jeep wrangler


Step 1:

The orange wire is the power wire. You should have 5 volts on this wire with the key on.


Step 2:

The dark green w/red wire is the signal return. Voltage will vary on this wire from less than a volt to just under 5 volts depending on if the engine is off, running, or what RPMS the engine is running.

Step 3:

The black w/light blue is the sensor ground.

Jan 16, 2013 | 2010 Jeep Wrangler

1 Answer

No fuel to motor?


Can you hear the fuel pump buzz for about 2 seconds after the key is first turned ON?
If yes, possible plugged filter or weak pump.
If no, locate the fuel pump relay near the brake booster. Should have an orange, tan/white, red, dark green/white and black/white wires. Unplug it and jumper the orange and tan/white wires for a second or two. Does the fule pump run now? If not, bad pump.
If it does run then it could be a bad relay or circuit.

Oct 10, 2011 | 1988 Pontiac Firebird

1 Answer

1988 Jeep Wrangler starting problems. I replaced the ignition module, spark plug wires, coil, distributor module, and my jeep will not start. It gets fuel, turns over, but still not starting. It is a 1988...


you are saying it is getting spark, and fuel, right? If it is getting spark, and fuel in to the throttle body, check compression-make sure the Mass Air Flow sensor is plugged in, and double check your spark-you say you replaced all those ignition items, but do not say that you have spark.

Jul 01, 2011 | 1988 Jeep Wrangler

1 Answer

1987 Jeep Cherokee-4.0L I6 auto tranny 4WD. Fuel pump will engage if straight wired but not if plugged in, engine will crank but not turn over, checked all relays & relaced battery cables &...


If you turn on the key and you do not hear the pump in the tank running for two secounds ( the same time your warning lights on your dash light up and goes off) then 1 you need to replace the pump or 2 it has low voltage to the pump or 3 both. I just repaired a 1987 pioneer what you need to know is the pump requires 12v at the pump, however OEM has placed an inline ballast resistor located on the driver side front engine compartment near the hood latch that is made of white ceramic with two connection both wires are orange with a black stripe. A. Check the voltage on both sides of the resistor 12v in 12v out use a volt meater - to battery + to resister if no voltes check the relay the passenger side of the engine compartment ( there is 4 relays from front to back it is no. 2 from the battery) looks like a small blue box newer relays are black, if they do not click when the key is on then your CPU may be bad or fusible link is bad If you have voltage to the resister and you have 12v in and less than 12v out your next test will be at the rear connector to the pump, three wires close to the fuel filter using a volt meater check the black wire with the orange / black stripe if voltage is less than the voltage out of your resistor then there is a bad wire in the system and a new wire is required. confirm this by jumping the battery to the pump wire black to- and orange to + the pump should run. Note. running the pump with lower than 12v will damage the pump and cause it to fail! If the pump works you can check the fuel pressure on the fuel rail, remove the cap to epose the shearder valve (looks like the valve on your tires) depress the valve stem and fuel should come out, caution fuel is under pressure have a rag under the valve to catch the fuel, if low pressure the pump is bad and/or filter is plugged Replace filter first recheck this test then replace pump and recheck. Note!!! when the pump is out of the tank recheck the voltage at the pump this will show true voltage at the last connector it needs to be 12 volts! Reconnect the pump wire the stock wire and check, on the pioneer I worked on was 4 volts so I rewired it to a new battery source using the orange /black strip wire that had 12v in to resistor as a trip wire for a 65 amp power relay. The owner noted an increase in overal performance " it now has more power now" hope this helps

Feb 23, 2011 | Jeep Cherokee Cars & Trucks

1 Answer

1992 yj 4.0, straight6, i replaced the 3 spd automatic with a nv3550 from 2003 rubicon and replaced the cps with new cps with new style inline plug. verified wiring with dealer. have the 8 volt supply from...


well i would think the crankshaft position sensor it bad/in wrong position/or the bell housing holds the crank sensor to far away from flywheel.if my memory is correct anything other than the jeep bellhousing wont work with the jeep fuel ign. system

Mar 22, 2010 | 1992 Jeep Wrangler

2 Answers

Jeep wrangler stalls out


check maf and tps sensor

Feb 18, 2009 | 1988 Jeep Wrangler

1 Answer

1988 jeep wrangler 6cylinder,5 speed trans, no a/c


Did you check the fuel filter? Did you check pump pressure? A faulty pump or a partially plugged filter can do this. Obviously filter is the first thing... it's easy to do and is often neglected, likely overdue for service anyhow! There are other things that can also cause your problem but I'd look at the common stuff first!
Good luck

Dec 30, 2008 | 1988 Jeep Wrangler

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