Voltage Drops - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-24-2011, 07:57 PM   #1
Join Date: Jun 2011
Location: North Georgia
Posts: 8
Voltage Drops

1990 4.2 ....just got gauges working and found a new problem...when at idle charging mid range on gauge...turn on air and voltage drops almost to red...turn on head lights with AC slight additional drop and interior lights dim...had Alternator checked bad diode so I replaced it with 73 amp OEM size for 4.2 with AC...Battery checked good...with the new Alternator no change....tested between Positive and Neg cables, with out battery hooked up, and have continuity between cables..pulled fuses one at a time checking for short, no change in continuity...What am I missing?


bharris is offline   Quote
Old 06-24-2011, 10:11 PM   #2
banks316's Avatar
Join Date: Apr 2011
Location: Longview, WA
Posts: 2,089
What i would do is clean up all the contacts from the battery to what ever they go to starter, block, alt etc. if that doesnt clear it up run a 4 guage wire from the positive on the alt to the battery.
93 YJ I6 5spd
My YJ Build +1.5 inch SOA ,37 12.50 15R Swamper M16's, 5.22:1/2.97:1 Stak Tcase with 92 Crawl Ratio--------SOLD...
banks316 is offline   Quote

electrical problem , short , voltage drop

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
check engine light came on and speedo stopped working @ the same time. eric TJ General Discussion Forum 14 10-14-2013 12:05 PM
Low Voltage Wrangler 1993 weinz69 YJ Tech Forum 3 06-13-2011 09:37 AM
No Injector Pulse, 89 Wrangler 2.5 4 cylinder friendx4 YJ Tech Forum 20 12-17-2009 01:53 PM
more juice 95_YJ YJ Tech Forum 8 09-08-2009 12:52 PM
A/C Almost Done but Voltage Drops skippytheclown YJ General Discussion Forum 3 08-10-2005 09:21 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 01:37 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 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