1988 Jeep Wrangler has no temperature reading?

Tiny
HEATHENSTEPHEN
  • MEMBER
  • 1988 JEEP WRANGLER
  • 4 CYL
  • 4WD
  • MANUAL
  • 140,000 MILES
Hi there!
1988 Jeep Wrangler here has a temperature gauge that has stopped working recently. It seems to get power because when I turn the ignition on the temperature gauge's needle jumps. But I drive long enough for the motor to warm up and the needle stays put and doesn't move.

Would this be the temperature sensor that's located on the manifold?

where's that CJ Medevac at!

Hey pal my Jeep is still kickin fella!

Talk to you soon!

Stephen
Saturday, July 23rd, 2011 AT 5:14 AM

9 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the coolant temperature sensor/switch on rear of intake manifold
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Saturday, July 23rd, 2011 AT 5:24 AM
Tiny
HEATHENSTEPHEN
  • MEMBER
  • 7 POSTS
Thank you rasmataz! That is what I was thinking but wasn't sure.
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Saturday, July 23rd, 2011 AT 5:34 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
MY GOSH!!!!!!!

I WAS ON HERE ALL DAY LONG YESTERDAY! (ASK THE REST OF 'EM!)

UP TILL 0200 THIS MORN, MESSIN' WITH A JEEP WANNA-BE

https://www.2carpros.com/questions/1999-chevrolet-blazer-radio-and-speedo

LOOKIN' THRU OLD STUFF, AND PROMOTIN' "US" (RATHER YOU NEWER FELLERS)

https://www.2carpros.com/questions/1989-mercury-tracer

I WORKED HARD, TRYING TO REMOVE A DOG GONE BROKE OFF SENSOR (WITH A MADE UP NAME??), ON A CAR I'VE NEVER SEEN UNDER THE HOOD----NOW THEY HAVE "SNUCK OFF", WHEN IT TIME TO TAKE ME OUT FOR CHOW!

https://www.2carpros.com/questions/2002-ford-windstar-brake-deactivation-switch

AND MANY MORE!

WENT TO GET IN MY BED (STEP YOUNGINS ON VACATION NOW, HAVE INVADED MY HOUSE FOR A WEEK)........FOUND 2 EVIL GRAND-MONSTERS HAD TAKEN OVER MY SPOT NEXT TO "ME-MA"....ALL OTHER LUXURIES TAKEN BY THE 4 OTHER EVIL BEINGS....SLEPT ON GARAGE FLOOR ON SLEEPING BAG, PUP-PUP GUARDING ME, NEXT TO MY FEET.

NOW THIS!!!

IT WAS NICE TO WAKE UP AND FIND, I AM RECOGNIZED BY A LEAST ONE OTHER IN THE WORLD!

I JUST TRIED TO FIND YOUR SENDER ON-LINE

I HAVE TO GO SNEAK INTO MY MAN CAVE TO FIND MY CHILTON CONCERNING YOUR YEAR SO YOU CAN TEST....IF THIS LINK IS CORRECT, AND THIS "SENSOR" IS YOUR "SENDER", YOURS IS EXPENSIVE, JUST TO "GUESS" AT IT...GIMME A BIT, I'LL INVESTIGATE!............A CJ IS SO EZ TO TEST!

http://www.autozone.com/autozone/parts/1988-Jeep-Wrangler-4WD/Coolant-Temperature-Sensor/_/N-ii2e9Z91shd?filterByKeyWord=coolant+temperature+sending+unit&fromString=search

YA'LL BEEN READING ABOUT ME? RUMMAGING THRU THE CJ 5 AND CJ 7 FORUMS???

THE MEDIC
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Saturday, July 23rd, 2011 AT 1:27 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
RAZ

IS THIS CORRECT?

REMOVE CONNECTOR, VIOLET ON SENDER TO A GROUND WILL MAKE TEMP GAUGE MAX OUT?

OR

REMOVE CONNECTOR "JUMP" BOTH WIRES ON CONNECTOR, TO EACH OTHER WILL MAKE GAUGE RISE?

OR

BOTH WOULD WORK, ONE METHOD OR THE OTHER WOULD VERIFY BAD GAUGE OR ONE OF THE 2 WIRES TO SENDER MAY BE OPEN?

IF SO, TRACKING THEM THROUGH, FOR A BREAK

OF COURSE, KEY ON, FOR EITHER SCENARIO!

?

I HAVE BEEN REVIEWING THE DIAGRAMS.I DO NOT SEE WHERE THE OTHER WIRE (NOT VIOLET) IS AT. ANYWHERE.I AM ASSUMING IT IS A GROUND?

SO THIS IS WHERE I STAND WITH THE WHOLE DEAL.

THE SENDER IS BAD.

THE GAUGE IS BAD.

THE VIOLET WIRE IS OPEN.

THE OTHER WIRE ON THE SENDER IS OPEN.

OTHER GAUGES WOULD NOT FUNCTION IF IT WERE A FUSE.

OR SOMETHING OPEN NEAR THE GAUGE.

THE TEST ABOVE MIGHT RULE SOME OF THIS OUT, OR POINT TO THE SENDER, FOR OVER $60

I DO HAVE ALL OF THE '88 WIRE DIAGRAMS DOWNLOADED. IF YOU/ ANYONE WANTS 'EM, LET ME KNOW!

RAZ WHAT'S THE TEST, POINTING TO THE SENDER?

THE MEDIC
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Saturday, July 23rd, 2011 AT 6:29 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Tan wire is the feed-jump connector the gauge should react if its good if not -open wire or the gauge itself
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Saturday, July 23rd, 2011 AT 9:15 PM
Tiny
HEATHENSTEPHEN
  • MEMBER
  • 7 POSTS
Hey buddy! Howya doin CJ MEDVAC! Long time no hear!

Say I still need to replace that temp sensor. I found one and I'm fixin to see if I can swap out the broke one.

But another issue arouse for me.

My Power Steering Pump is leaking like a get-out! So I located a replacement and I have to swap out that too.

Would you have any pointers? Is there like special one time use crush washers on anything I need to replace while I'm doing this task? I can't tell where the leak is coming from (it is underneath the pump) but both of the Power Steering hoses seem to look all right.

Would you have any pointers bud?

Thanks partner!

Stephen
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Sunday, November 13th, 2011 AT 7:01 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
INSURE IT AIN'T JUST A HOSE LEAKING

USE A GOOD STRONG FLASHLIGHT AND A HAND/ INSPECTION/ GIRLFRIENDS MIRROR OR COMPACT TO LOOK IT OVER WELL.

KEEP US POSTED ON HOW IT'S GOING

THE MEDIC
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Sunday, November 13th, 2011 AT 3:24 PM
Tiny
HEATHENSTEPHEN
  • MEMBER
  • 7 POSTS
Thank ya kindly there CJ MEDVAC! Hope all is well back there with you.

I'll be sure to update you on my progress

Thanks!

Stephen
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Sunday, November 13th, 2011 AT 5:45 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
GOOD UPDATES, NONE LIKE THIS

(: (

YOU REALLY DIDN'T HAVE TO BREAK SOMETHING ELSE, JUST TO COME SEE US

THE MEDIC
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Sunday, November 13th, 2011 AT 8:53 PM

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