Electrical Short???? - JeepForum.com

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post #1 of 28 Old 02-23-2010, 04:42 PM Thread Starter
Elsahara
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Electrical Short????

Just driving tonight, hit a rather nasty bump on a set of train tracks and for just a couple second it killed the interior dash lights and at least the head lights. DID NOT effect the engine though.

voltage meter stayed steady at 14 volts after. not sure if it was higher before but thought it was around 15-16???

Popped the hood to find the PO had bunged the batt. down and the cables and connectors are none to nice looking. But havent noticed it effect anything yet.

Hit a few more nasty bumps and it didnt act up but for obvious reasons I dont like it like not being able to see at night

any thoughts?

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post #2 of 28 Old 02-23-2010, 04:49 PM
GRN_BEAST95
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ummm well sometimes the lights and interior lights will shut off if the light switch is failing. Did the engine studder or turn of or anything?

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Quote:
Originally Posted by yellojeeper View Post
Guam. I spent a week there one night.
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post #3 of 28 Old 02-23-2010, 05:01 PM Thread Starter
Elsahara
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Originally Posted by GRN_BEAST95 View Post
ummm well sometimes the lights and interior lights will shut off if the light switch is failing. Did the engine studder or turn of or anything?
if it did, (girlfriend was driving) she didnt notice and its at the bottom of a hill so when you get over the "dukes of hazard" rail road jump you have to accelerate.

good idea tho, if it was the switch, would it fail intermittently and then eventually crap out?
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post #4 of 28 Old 02-23-2010, 05:38 PM
laybackman
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Quote:
Originally Posted by Elsahara View Post
if it did, (girlfriend was driving) she didnt notice and its at the bottom of a hill so when you get over the "dukes of hazard" rail road jump you have to accelerate.

good idea tho, if it was the switch, would it fail intermittently and then eventually crap out?
Did the lights ever give your crap before? If not then the 'bump' caused the rpoblem you have, most likely.

Are they still not working?

Does the Jeep start up OK?

My first thoughts are the ground on the battery or the one on the engine block to firewall was knocked loose.

It is possible the light switch just happened to go out but did you check all of your fuses in the PDC under the hood?

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #5 of 28 Old 02-23-2010, 05:47 PM Thread Starter
Elsahara
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Only cut out for a couple of nervous seconds.

They came on and even after a few more back jolting bumps they stayed on.

Starts up just fine, even if its cold.

Didnt check anything other then a quick visual.
figured if a fuse blew then it would have killed the lights permanently.

Will check the ground in the morning, but like i said in the first post, the terminals are def not great so i figure the engine ground is in the same condition.
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post #6 of 28 Old 02-23-2010, 06:46 PM
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Quote:
Originally Posted by Elsahara View Post
Only cut out for a couple of nervous seconds.

They came on and even after a few more back jolting bumps they stayed on.

Starts up just fine, even if its cold.

Didnt check anything other then a quick visual.
figured if a fuse blew then it would have killed the lights permanently.

Will check the ground in the morning, but like i said in the first post, the terminals are def not great so i figure the engine ground is in the same condition.
Doing preventative maintenance is wise. Because when you have no time, and no money your Jeep will konk out!

Fixing somethong that is not now broken is even harder!! OR easier.....depends on how you look at it.

and clogged plugs are ..but you can not fix what is not broken!

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #7 of 28 Old 02-23-2010, 07:02 PM Thread Starter
Elsahara
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Originally Posted by laybackman View Post
Doing preventative maintenance is wise. Because when you have no time, and no money your Jeep will konk out!

Fixing somethong that is not now broken is even harder!! OR easier.....depends on how you look at it.

and clogged plugs are ..but you can not fix what is not broken!
lol so your telling me my plugs are clogged
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post #8 of 28 Old 02-23-2010, 07:24 PM
GRN_BEAST95
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When my headlight switch went out it did it randomly. like one day it would go out and come back on repeatedly and then it would be fine for a week and then happen again. But yeah check your grounds. i wouldnt stop at just the battery grounds i would check all of them.

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Quote:
Originally Posted by yellojeeper View Post
Guam. I spent a week there one night.
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post #9 of 28 Old 02-23-2010, 07:37 PM
cwjeep
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mine did the same thing. had loose ground between motor and fire wall. installed a battery cable from motor to firewall. had no more problems.
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post #10 of 28 Old 02-23-2010, 07:52 PM Thread Starter
Elsahara
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Quote:
Originally Posted by GRN_BEAST95 View Post
When my headlight switch went out it did it randomly. like one day it would go out and come back on repeatedly and then it would be fine for a week and then happen again. But yeah check your grounds. i wouldnt stop at just the battery grounds i would check all of them.
Quote:
Originally Posted by cwjeep View Post
mine did the same thing. had loose ground between motor and fire wall. installed a battery cable from motor to firewall. had no more problems.

I will def check the grounds.

So you put a wire from your engine block ground to the firewall? was this ran to an existing ground on the firewall or did you make a new one?
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post #11 of 28 Old 02-23-2010, 07:56 PM
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Dont mean to Highjack but my lights did the same thing. Only between idle and when I accelerate do they turn off. And the highbeam indicators turn on when the lights go out....
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post #12 of 28 Old 02-23-2010, 07:59 PM Thread Starter
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Originally Posted by clemsonfan16 View Post
Dont mean to Highjack but my lights did the same thing. Only between idle and when I accelerate do they turn off. And the highbeam indicators turn on when the lights go out....


HIGHJACKED!!!!!!!! come on!


just playin sounds like you need more help then i do
from what i am learning, lack of proper grounding can do some funny things. maybe you could pull out the haynes or chiltons and see where they are. thats my plan.
goodluck!!!
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post #13 of 28 Old 02-23-2010, 08:11 PM
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Quote:
Originally Posted by Elsahara View Post
lol so your telling me my plugs are clogged

I have absolutely no idea how/why I typed that into my answer!!!!

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #14 of 28 Old 02-23-2010, 08:18 PM
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Quote:
Originally Posted by Elsahara View Post
HIGHJACKED!!!!!!!! come on!


just playin sounds like you need more help then i do
from what i am learning, lack of proper grounding can do some funny things. maybe you could pull out the haynes or chiltons and see where they are. thats my plan.
goodluck!!!
Haha sounds like we are in the same boat as far as grounding goes. I have absolutley no clue what is the problem though...But yeah im going to check the engine ground. If you get to it before me let me know!
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post #15 of 28 Old 02-23-2010, 09:34 PM
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Quote:
Originally Posted by clemsonfan16 View Post
Haha sounds like we are in the same boat as far as grounding goes. I have absolutely no clue what is the problem though...But yeah im going to check the engine ground. If you get to it before me let me know!
To both you and the OP, this sounds to be more of a power issue rather than a ground. Both headlights are individually grounded. If both are going out, then this is more apt to be a power problem. If the dash illumination is dropping at the same time, then for the '88 and '89 model years that have been mentioned, I would suspect a bad fusible link or connection there to.
If just the headlamps are dropping out on these years, then it is likely the headlamp switch, the hi/low dimmer switch or the wiring suppling power to/from all of the above.
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