• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Electric issue??


Figgy1227

New Member
Joined
Aug 15, 2020
Messages
2
Reaction score
0
Points
1
Location
Kennewick
Vehicle Year
1987
Make / Model
Bronco ii
Transmission
Manual
So I have gone over all the grounds and all of the wires inside my rig. I have even pulled the alt wires to look at them. I can’t find anything. I charged my battery up to 12.6 volts and then drove with it and watched slowly as the volts dropped back down to currently 12.0 to 12.1. I got the battery tested as well and it is good. I am thinking of replacing alt tmrrw but was wondering if there was any other possible ideas I’ve missed.
 


Dirtman

Former Middleweight Moss Fighting Champion
Joined
May 28, 2018
Messages
19,304
Reaction score
13,331
Points
113
Location
41N 75W
Vehicle Year
2009
Engine Type
2.3 (4 Cylinder)
Transmission
Automatic
2WD / 4WD
2WD
Total Lift
It's up there.
Total Drop
It's down there.
Tire Size
Round.
My credo
I poop in the furnace.
Check the fusible link
 

ericbphoto

Overlander in development
TRS Event Staff
TRS Forum Moderator
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
VAGABOND
TRS Event Participant
GMRS Radio License
TRS 25th Anniversary
Joined
Feb 7, 2016
Messages
15,532
Reaction score
17,016
Points
113
Age
59
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
There are some diagrams and troubleshooting info in the tech library that could help you. I believe the fusible link dirtman referred to will be orange (16awg)
 

RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,364
Reaction score
8,391
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Welcome to TRS :)

With engine running Battery Voltage should show 14.3-14.7volts just after startup, then drop to 13.5-13.8volts after 5 minutes of idling
This is the alternator and voltage regulator working as it should

A car battery is ONLY used to start the engine, after engine is running ALL voltage comes from the alternator, so volts will be above 13.5volts always, this is to keep the battery charged for the next "start up"

To test vehicle wiring
Key OFF
Ground volt meter to alternators metal case

Test B+, its the larger wire connection on the stud/nut on the back of alternator, you don't need to remove it
B+ should show Battery Volts, 12.3-12.8v
If not then yes fusible link is blown or disconnected

Unplug the 2 or 3 wire connector on voltage regulator on the back or side of the alternator
Yellow wire should have Battery Volts, if not same fusible link as above is blown

Test Light Green wire, should have 0volts
Turn Key ON(engine off)
Test Light Green wire again, should now have Battery Volts, this wire is the ON/OFF switch for alternator, its also the Battery Light wire if you have that indicator, and not an AMP gauge

So test these 3 wires, if they test OK and with engine running you don't see above 13.5volts at battery then alternator is for sure bad, not a guess
 

Sponsored Ad


Sponsored Ad

Staff online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


XLTsplash
June Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top