voltage

My HDJ81 began having starting issues over the weekend, whereupon first attempt to crank I would simply hear is the relays engage, but no starter cranking. Upon second attempt it would consistently crank and fire. I knew this would be short-lived, so I began troubleshooting. I'm glad I did...

Hey crew Factory vault gauge in dash has never worked and I’ve had a look at the back and it looks to be wired up okay? But I have no idea if there is something missing. Any tips on what I need to be looking for/checking/replacing to get it back on track? Cheers

I was cleaning up some wiring mess under the dash of my FJ80 prior owner had a mess under there from a security system, and wiring up radio with speakers and whatnot.. After I got done everything works fine got back from a 30 min drive doing some errands shut truck off keyed it back on to check...

77' FJ40 Had the truck for over a year now and finally beginning to troubleshooting inconsistent headlights/wipers between idle and driving. seems that all signs point to the alternator/voltage regulator. Been chasing the wiring all thru the engine bay and i can't find a voltage regulator...

Got a '40 with 2 voltage regulators on it. one is for the amp meter, the other is hooked up to a warning light. That does not sound right to me. why is there 2 of them

Hi Everyone, did the regular searchin around, found the voltage regulator thread. couldnt find my answer and no one responded when I posted in that tthread so Ill try here. 82 hj47 troopy previously had adjusted my "tab" in the VR with sucsess to acheive 14.2 at 2000rpm. over about a2 months...

Hi all, i have been trying to fix this problem but cannot find any thread with the same problem. The old owner changed all the gauges to aftermarket but i have changed it back to original. I have got all of them to work after alot of work but as soon as i rev the engine i lose the engine temp...

The last thing I want is an electrical fire so coming to the IH8MUD brain trust for thoughts. There has been a few times after driving the battery seemed too low to efficiently engage (original) starter. I’ve kept a battery tender on the battery so it’s fully charged when needed. I recently...

Last summer I installed a battery equalizer system on my 24V '89 BJ73. This allows 12 volt accessories to pull from the first battery in series while maintaining an equal charge on both batteries. I won't go into the science of why equal charge is important on 24V series systems, but it's worth...

I have a 2001 Lexus LX470 that won’t charge the battery. The alternator, the belt tensioner and the serpentine belt were replaced today. It still won’t charge and I am lost at what to look at next. The two frame grounds near the battery have been checked, cleaned and tightened. All of the fuses...

Looking for others that have delve deep into the wiring schematics for the 100 series. I have been running some diag on the ecm of a '99 and have been finding some discrepancies in what Toyota claims the voltages should be at certain pinouts. I'll find in one section of a modules terminal...

I have an Anderson 50 amp plug that goes to my trailer dc-to-dc charger charging my battery running my fridge that is in the trailer. I want a wire running to the trailer so I cam monitor my voltage on the batteries running the fridge. Should I use a 2nd mini Anderson connector I can run so I...

I recently pulled out my voltage regulator on my 77 cruiser to check if it is working properly, but when I look at the FSM I am confused. There are 2 styles in my book and my regulator has parts of both. What is correct for April of 77?? Is this even an oem regulator? Thanks for any help.

Hi everyone, the voltage regulator is done in the hj47 i believe. adjustments this morning did nothing and produces like 12.5 while driving right now, so Iwana swap it out. started looking for oem and had a hard time. found some F.D ones and then saw a hella one made by denso for pretty cheap...

My left rear turn signal quit working. After installing a new turn signal bulb, new harness, and new flasher relay... I have fluctuating voltage at the socket. I get 12 volts, then the voltage drops to 3 t0 5 volts for a few cycles, then 12 volts again for a cycle or two. This happens when the...

With a Dakota Digital instrument cluster, what is the normal voltage reading at operating speed? Ours is consistently reading over 15v with headlights on. I’ve read Rudy’s excellent write/up on voltage regulators Voltage Regulator (ext.) / How it works -...

Hi everyone, this is my first post after getting to know my 1978 BJ40 (24v) for a few months and extensive lurking on these boards. Amazing how valuable ih8mud is as a resource - thanks everyone for sharing your experience and I'm hoping someone can help me solve a puzzle! Overall my BJ is in...

Hey everyone! My 1976 FJ40 has been dead reliable apart from the oil pressure, fuel, and temperature gauges not working. I’m guessing it may be due to the absolutely gnarly aftermarket voltage regulator that’s seen better days. I ordered an OEM replacement from @ToyotaMatt earlier this year and...

2009 LX570 with 169k miles. 20-40A of aftermarket loads on occasion. Swapped out this failing alternator that showed symptoms of low voltage and not sufficiently charging the starting battery. https://forum.ih8mud.com/threads/rth-alternator-suspect-voltage-output.1316746/ Tore this down...