07-28-2022, 06:18 PM
|
#1
|
|
Junior Member
|
|
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
|
|
Junior Member
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
Bad diode causing baby light on???
Posted before about my 2006 Sport having a batt light on. Checked batt, showed 11.6, replaced. Light still on, checked alt, 12 9 running....replaced alt.Now batt at 12.8, running , alt is 14.2, drops to 13.9, 14.1.....light still on . Alt harness is mint, every fuse has been checked, all the 7.5 replaced....scanned, clear...one member here mentioned that it might be a bad diode? Is there a diode that can trip the light (no 12v output for light) and will still let the alt charge normal? I'll replace the Remy rebuilt alt if there's a chance that a bad diode could cause this.....figure that someone on the site does electrical trouble shooting...Thanks, rsbhunter
|
|
 Reply With Quote
|
|
07-28-2022, 08:28 PM
|
#2
|
|
Senior Member
|
|
Join Date: Nov 2016
Location: South Carolina
Posts: 4,310
Real Name: Skip
|
|
|
Senior Member
Join Date: Nov 2016
Location: South Carolina
Posts: 4,310
Real Name: Skip
|
Quote:
Originally Posted by Rsbhunter
Posted before about my 2006 Sport having a batt light on. Checked batt, showed 11.6, replaced. Light still on, checked alt, 12 9 running....replaced alt.Now batt at 12.8, running , alt is 14.2, drops to 13.9, 14.1.....light still on . Alt harness is mint, every fuse has been checked, all the 7.5 replaced....scanned, clear...one member here mentioned that it might be a bad diode? Is there a diode that can trip the light (no 12v output for light) and will still let the alt charge normal? I'll replace the Remy rebuilt alt if there's a chance that a bad diode could cause this.....figure that someone on the site does electrical trouble shooting...Thanks, rsbhunter
|
Here's a link to search results on YouTube for testing alternator diodes, and other tests using a multi-meter, one or more of the videos may help you track down what the issue is.
https://www.youtube.com/results?sear...th+multimeter+
__________________
2004 Limited V8
Last edited by AuSeeker; 07-28-2022 at 08:31 PM.
|
|
|
Reply With Quote
|
|
07-31-2022, 10:20 AM
|
#3
|
 |
Moderator
|
|
Join Date: Jun 2004
Location: the Socialist State of Maryland
Posts: 11,207
Real Name: The Chosen One
|
|
|
Moderator
Join Date: Jun 2004
Location: the Socialist State of Maryland
Posts: 11,207
Real Name: The Chosen One
|
Quote:
Originally Posted by AuSeeker
Here's a link to search results on YouTube for testing alternator diodes, and other tests using a multi-meter, one or more of the videos may help you track down what the issue is.
|
That is for the diode-trio in the alt, I think the OP is talking about one of the steering diodes in the Instrument Panel that control the idiot lights.
The FSM has info on testing all that.
__________________
 - the Internet - the mother-ship of people who don't know much and aren't afraid to go public
'84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, 2" drive train lift, BudBuilt x-member/skid, 30 spl Longs
'83 Toy P/U - Buick 231 V6, Holley 4 bbl, Weiand intake, Downey headers, TH350 w/700R4 low gearset,
'89 4Runner SR5 - stock
|
|
|
Reply With Quote
|
|
07-31-2022, 04:50 PM
|
#4
|
|
Senior Member
|
|
Join Date: Nov 2016
Location: South Carolina
Posts: 4,310
Real Name: Skip
|
|
|
Senior Member
Join Date: Nov 2016
Location: South Carolina
Posts: 4,310
Real Name: Skip
|
Quote:
Originally Posted by fourwd1
That is for the diode-trio in the alt, I think the OP is talking about one of the steering diodes in the Instrument Panel that control the idiot lights.
The FSM has info on testing all that.
|
I posted that because he was asking another member if he could test the diode with the alternator still in the vehicle.
Here's a link to their conversation on his profile page, I also saw it discussed in another topic as well.
https://www.toyota-4runner.org/conve...39095&u2=44255
It appears he hasn't visited the forum since he posted this topic so we won't know which diode his question is referring too until he returns and replies.
__________________
2004 Limited V8
Last edited by AuSeeker; 07-31-2022 at 04:53 PM.
|
|
|
Reply With Quote
|
|
08-08-2022, 03:32 PM
|
#5
|
|
Junior Member
|
|
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
|
|
Junior Member
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
Batt light on
Actually, I was asking about the alt diodes....this is driving me crazy....new battery, new (rebuilt) alt.... No blown fuses, wiring never messed with....truck has not been beat, has been on road for 99% of its life....everything is stock except for batt, alt....How many wires are supposed to come out of the alternator plug? Thanks, I'm 67 years old, have worked on my own cars since 15, and I'm not looking to have to replace the alt again, but I'm looking at a rebuilt Denso unit (this one is a Remy)from Summit Racing. If anybody feels that would be a mistake, PLEASE let me know, Thanks...rsbhunter
|
|
|
Reply With Quote
|
|
08-18-2022, 05:20 PM
|
#6
|
|
Junior Member
|
|
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
|
|
Junior Member
Join Date: Mar 2016
Location: S.E. New Mexico
Posts: 24
|
Battery light STILL ON!
Ok,broke down and put in a rebuilt Denso unit from Denso, California!!!! Yeah, no. Light still on....I'm done, I'll pay a technician $$$$ from Toyota dealer to figure it out.....can't believe there's not a Toyota technician on this site who hasn't run into this problem..... Guess it will be a piece of electrical tape that fixes this problem..... rsbhunter
|
|
|
Reply With Quote
|
| Thread Tools |
|
|
| Display Modes |
Rate This Thread |
 Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
|
