power, but no crank. - Page 2 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today

Like Tree3Likes
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-22-2019, 09:01 AM   #31
Join Date: Jul 2012
Posts: 844
It sounds like you are not getting power to anything beyond the power control module. Check for power at every fuse and relay in the PCM and advise what you find.

WICruiser is offline   Quote
Old 05-22-2019, 01:57 PM   #32
Join Date: Jan 2019
Location: Round Rock, TX
Posts: 172
Originally Posted by Corlauv View Post
I mean that it cranks with a screw driver. I also just used a test light and when I have a friend crank the jeep while I have a test light down by the starter where the power is sent to it when you crank it, the test light does not light when he cranks the jeep.
I think we can figure this out without shotgunning parts at it. This statement seems like a a good clue and gives a place to test further.

My spot I could check next is the Starting relay at the power distribution center. Find the relay and pull it. There are 4 pins under the relay that you want to check.

There are 2 load side pins. This is the switched side of the relay or the relay will connect these two pins when relay is switched on. One pin is from fuse 4 which is a 40amp (pin 30 on relay). The other pin goes to the starter solenoid down on the starter motor (pin 87).

The 2 control side pins are what enables the switch in the relay. One pin comes from the ignition switch and will have batt + in start (pin 86). The other pin goes to ground (pin 85). This should be grounded if the auto trans is in Park or Neutral Or on a manual, I think it goes straight to ground.

Now how to test this....

Take a test light. Connect clamp to ground or batt neg. Touch each of the four pins. One should light all the time. This is the load side that comes from fuse 4. This is pin 30 on the relay.

One pin should light when key is in start. This is pin 86 (it may be 85). This is power to the coil or control side of the relay.

Now connect test light to battery pos. Touch pin 85. This should light the test light all the time if it's a manual or in Park/Neutral on an auto.

With the test light still on battery pos see if you can find pin 87. This is the pin that goes to the starter solenoid. If the starter solenoid works, it should lightly light the test light. It's a path to ground so should light the test light a little. I am not 100% certain in this but it's worth a try. Also a DVOM should show continuity to ground as an alternative.

Try this and report your results. We can figure this out.

sequel is offline   Quote
Old 05-28-2019, 10:07 AM   #33
Join Date: Jan 2019
Location: Round Rock, TX
Posts: 172
OP, what's the latest?
sequel is offline   Quote
Sponsored Links
Old 06-18-2019, 04:28 PM
Thread Starter
Corlauv's Avatar
Join Date: Dec 2018
Posts: 73
Can somebody tell me what this connector from under the dash is supposed to connect to? I just was following some wires and saw that this was just hanging here and I cant find where it's supposed to connect to???
Attached Thumbnails
Click image for larger version

Name:	15608931976097758757889513517996_1560893211837.jpg
Views:	13
Size:	107.5 KB
ID:	4158289   Click image for larger version

Name:	15608932240044942728855944340839_1560893237660.jpg
Views:	11
Size:	93.3 KB
ID:	4158293  

Click image for larger version

Name:	15608932514047138776377547850398_1560893264450.jpg
Views:	10
Size:	80.6 KB
ID:	4158295  
Corlauv is offline   Quote
Old 06-18-2019, 08:12 PM   #35
Supporting Member

5-Year WF Supporting Member
Got it at last's Avatar
Join Date: Nov 2016
Location: Phoenix, Az
Posts: 1,577
Light socket for either the fan switch, or the fog light rocker switch that's supposed to be where your plow light toggle is. Can't remember exactly which without looking at mine.
IRQ and Batjac like this.
'89 YJ 4.2 with MC-2150 Carb & HEI, 2-1/2" Magnaflow Exhaust. BA-10, NP231, Adams front Diveshaft, SYE kit, 31x 10.5 x15 BFG KO's, 2 1/2" Rancho Spring kit, 1" Body Lift. RS5000x shocks, No emissions.

FSM Manuals https://www.dropbox.com/sh/0vfmk6jc5...v7lceZk7a?dl=0
Got it at last is offline   Quote
Old 06-19-2019, 06:09 PM
Thread Starter
Corlauv's Avatar
Join Date: Dec 2018
Posts: 73
Okay thanks, and I have a few others that I dont know what they connect to, I've replaced so much and tested literally everything and i cannot get my jeep to start, it's not getting fuel or spark even though everything is connected correctly and grounded and cleaned... here are some pictures of the connectors that I dont know where they go or what they do.
Attached Thumbnails
Click image for larger version

Name:	1560985591606716419841442461027_1560985611172.jpg
Views:	10
Size:	184.6 KB
ID:	4158669   Click image for larger version

Name:	15609856232004686184139926526143_1560985634792.jpg
Views:	9
Size:	134.7 KB
ID:	4158677  

Click image for larger version

Name:	15609856570114152325361643387885_1560985667192.jpg
Views:	8
Size:	130.9 KB
ID:	4158679   Click image for larger version

Name:	15609856794842893338635888328374_1560985713038.jpg
Views:	11
Size:	193.5 KB
ID:	4158681  

Corlauv is offline   Quote
Old 06-22-2019, 02:09 PM
Thread Starter
Corlauv's Avatar
Join Date: Dec 2018
Posts: 73
So, I just changed my crank position sensor and checked all my electrical connections and I am still not getting any spark or fuel pressure, the pump is getting power to it but not turning on. This is confusing because all the previous forums on this topic say that it's either the computer or the crank position sensor, but I've changed both already... I'm lost and dont know what to test next
Corlauv is offline   Quote
Old 06-22-2019, 02:29 PM   #38

WF Supporting Member
::WF Moderator::
Luckymac's Avatar
Join Date: Jan 2014
Location: SouthEast of Denver
Posts: 8,325
If your fuel pump is getting power but not turning on, I would suspect that the fuel pump is bad.

What makes me consider another possible issue is that I understand there's a relay near the power distribution center that controls spark and fuel. I have an older carbureted model so I'm not positive about fuel injected YJs.

Try looking for a post by Got it at last and look in his signature for a link to several manuals. Find the manual that most closely matches your Jeep and search for the engine diagnostic flowchart. Follow the procedures in the flowchart to determine how to discover why your Jeep won't start.

Let us know what you find.

Good Luck, L.M.

"Wrangler....It's not just a vehicle, It's a lifestyle".
.................................................. ........................
1987 YJ-4.2L-Standard Shift- Re-manufactured Carter Carb-2" body Lift-31X10.5X15 BFG KOs-190K Miles No back seat.
HEI distributor with computer and all related relays and wiring removed.
12K Badlands winch with dual batteries.
Warn front bumper. Matching imitation Warn bumper on the rear.
Luckymac is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
No gauges, crank but no start, 16.5v battery biff_pedachenko TJ Tech Forum 6 12-15-2018 01:31 PM
99 Wrangler Sahara - Crank but no start, No gauges Please help funktasticp24 TJ Tech Forum 4 10-07-2015 05:54 AM
All power on but no crank or no start evanlane5 YJ Tech Forum 11 03-15-2015 01:13 PM
Crank crank crank, no start 1987Wrangler YJ YJ Tech Forum 3 07-15-2013 01:09 AM

All times are GMT -5. The time now is 04:03 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC