Question about 1996 Toyota T100

1 Answer

Battery light on, voltage spiking

Battery light on voltage spiking

Posted by Anonymous on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

One of two things is happening, first if you have added an aftermarket stereo or cd/dvd player ,It may not be grounded correctly .
Over time after this install what is known as a high yield hydrostatic charge is discharged throughout the vehicle. Causing a high amount of corrosion on the battery terminals.----and a high amount of static though the cab of the truck as well.. In turn it also creates a fair amount of high charge/discharge in the alternator. As a car is truly a self contained battery charging station.
My solution was first to rewire the ground of the cd/dvd player unit then from there I replaced the factory ground wire with a three lead wire assembly to create a second secondary ground strap attached to the body of the truck using a body bolt on the inside of the hood.
The only other thing that can happen is either the battery or the alternator is going out or a bad connection in that event refer to the service manual as to replace said units
Certified M.A.T, ASE
Mike Williams

Posted on Feb 08, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

2002 Crown Vic overcharging.

unless the voltage regulator is in the alternator, changing the alternator was a waste of money
the problem is in the voltage regulator which in your case a separate unit or in the ECM
voltage is regulated to 14.5-14.8 volts dc and any excessive voltage can burn the ECM and cause all sorts of electronic failures
time to get an accredited auto electrician involved as you are wasting money doing it yourself

Nov 09, 2017 | Cars & Trucks

1 Answer

My 96 s10 blazer feels like the brakes are being s applied lights are dimming and fuel and rpm gages are spiking

indicates insufficient voltage to run engine electronics and other electrical requirements
indicates failing battery
could be the alternator is not charging---check drive belt condition and tension
rectifier failing
voltage regulator problems
check for battery & terminals are shiny clean and tight and the ground wire is properly fixed

Jun 25, 2016 | Cars & Trucks

1 Answer

How do I check if it is alternater or battery

if wont jump battery has internal short and is bad replace with good battery get cheap ohm meter to test alternator out put. install battery ck voltage start engine ck voltage should rear 13-14 volts if not charging will read battery voltage with steady voltage drop. running with neg. cable unhooked can cause damage from voltage spike.

Jul 15, 2012 | 1995 Toyota 4Runner

1 Answer

Battery light on, voltage spiking

loosing ground circuit. check battery ground and also chassis to body ground

Mar 21, 2010 | 1996 Toyota T100

1 Answer

Replaced alternator and battery 2x and only works for short time.

This could be caused by a faulty voltage regulator, but since it has happened on more that one alternator, that can't be the problem, right? The next thing that I would look at would be a defective or loose belt. Also check the tensioner to make sure it is working properly and is keeping tension on the belt. If the belt is slipping or is worn out, it will cause voltage fluctuations. You may want to look at changing or at least inspecting the belt. Hope this helps and best wishes.

Aug 27, 2009 | 2000 Mercury Cougar

1 Answer

Dad's Dodge Durango light problems

The proper way to jump start is to start the car that is doing the boosting first then connect the cables, making sure that the polarities are right, negative to negative and vice versa. The reason for this is that while cranking the car doing the boosting, the the car with the low battery suffer a significant voltage spike since the sudden draw of current will pull the voltage down on a weak battery, and when the car do start, the voltage suddenly goes up, adding to that, the alternator bring the voltage even higher. Electronic circuits are sesitive to these voltage spikes. Still I doubt your problem is caused by these unless theses things you are having problems with are controlled electronic,.

Aug 01, 2009 | 2002 Dodge Durango

1 Answer

1999 hyundai accent code b1111 powr spike setting off aairbag light battery and alternater replaced light set off again

B1111 Battery voltage - HighWhat code was set when the 'light set off again'? Did you scan for trouble codes? Was it the SAME code - B1111? If so, then you got a bad alternator (voltage regulator).

Jul 17, 2009 | Hyundai Accent Cars & Trucks

Not finding what you are looking for?
1996 Toyota T100 Logo

141 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

80339 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides