Normal Voltage Behavior?
#16
EvoM Community Team Leader
Welp had the new alternator for about a year and a half and the battery and brake light is starting to show. Still have same voltage issues where the car starts with 14ish volts and slowly goes down to like 13's and 12's with no lights/ac on and with ac/lights on to low 11's to high 10's. After the car is off over night the voltage starts back up at 14 and its rinse and repeat.
So at this point I think it's the alternator (oem) but since I have my original I think I'll just have a place rebuild it, unless someone has an idea on what to try. Replacing the alternator sucks really bad...
So at this point I think it's the alternator (oem) but since I have my original I think I'll just have a place rebuild it, unless someone has an idea on what to try. Replacing the alternator sucks really bad...
#17
Only thing aftermarket wise is just 4 gauges. Everything is pretty damn tightened. I did have one loose nut for the alternator output but after it was tightened it didn't make a difference. While driving I'm getting voltage readings from lighter socket. When out of the car, I use a battery tester. It starts at 14 fine when testing from the battery. When I turn ac and all the shazz on it'll drop to low 12's and I can see the needle from the reader going down very slowly. I'll try the Ohm thing.
#18
EvoM Community Team Leader
Only thing aftermarket wise is just 4 gauges. Everything is pretty damn tightened. I did have one loose nut for the alternator output but after it was tightened it didn't make a difference. While driving I'm getting voltage readings from lighter socket. When out of the car, I use a battery tester. It starts at 14 fine when testing from the battery. When I turn ac and all the shazz on it'll drop to low 12's and I can see the needle from the reader going down very slowly. I'll try the Ohm thing.
The following users liked this post:
CaptainSquirts (Jun 26, 2018)
#20
Had a mechanic take a look and noticed the wires from the alternator output is very green and corroded for how much we can see. Said it could be the wire failing.
So at this point I wonder if I should just purchase this.. Is the harness itself easy to do? Meaning I don't have to do anything extreme to be able to unplug and replug everything.
https://stmtuned.com/products/positi...t=990289362953
So at this point I wonder if I should just purchase this.. Is the harness itself easy to do? Meaning I don't have to do anything extreme to be able to unplug and replug everything.
https://stmtuned.com/products/positi...t=990289362953
Last edited by CaptainSquirts; Jun 26, 2018 at 08:47 AM.
#21
EvoM Community Team Leader
Had a mechanic take a look and noticed the wires from the alternator output is very green and corroded for how much we can see. Said it could be the wire failing.
So at this point I wonder if I should just purchase this.. Is the harness itself easy to do? Meaning I don't have to do anything extreme to be able to unplug and replug everything.
https://stmtuned.com/products/positi...t=990289362953
So at this point I wonder if I should just purchase this.. Is the harness itself easy to do? Meaning I don't have to do anything extreme to be able to unplug and replug everything.
https://stmtuned.com/products/positi...t=990289362953
The following users liked this post:
CaptainSquirts (Jun 26, 2018)
#22
Alternator is bad. Tested the alternator itself with a multimeter and it was only putting out like 12ish volts. So it seems when its cool, the alternator voltage is more normal. When it starts to warm up and gets hot, the voltage drops. Good thing I went with an OEM so it could only last for a year and a half :/
#23
EvoM Community Team Leader
Alternator is bad. Tested the alternator itself with a multimeter and it was only putting out like 12ish volts. So it seems when its cool, the alternator voltage is more normal. When it starts to warm up and gets hot, the voltage drops. Good thing I went with an OEM so it could only last for a year and a half :/
#24
I replaced the wire that goes from battery to the alternator. When the test was redone, the battery was connected to the alt still, car started. Then measured from the alternator directly. And unfortunately there is no warranty on mitsubishi electrical stuff per stm.
#25
EvoM Community Team Leader
I replaced the wire that goes from battery to the alternator. When the test was redone, the battery was connected to the alt still, car started. Then measured from the alternator directly. And unfortunately there is no warranty on mitsubishi electrical stuff per stm.
#27
EvoM Community Team Leader
I would go around and just inspect the rest of the harness, as much as you can anyway, and see if anything else catches your eye. The connections that connect pretty much the entire interior electrical system to the battery/alternator are here:
my car is a DD so pardon stuff being a little dirty.
So you can measure voltage drop from the alternator to this point and then from this point to pretty much anything else to help diagnose an issue. It would probably also be a good idea to inspect/tighten all (or as many as you can get to) the chassis grounds, our cars aren't exactly the smoothest and vibrations loosen stuff over time.
Here are all the chassis grounds (evo 8)
my car is a DD so pardon stuff being a little dirty.
So you can measure voltage drop from the alternator to this point and then from this point to pretty much anything else to help diagnose an issue. It would probably also be a good idea to inspect/tighten all (or as many as you can get to) the chassis grounds, our cars aren't exactly the smoothest and vibrations loosen stuff over time.
Here are all the chassis grounds (evo 8)
The following users liked this post:
CaptainSquirts (Jun 28, 2018)
Thread
Thread Starter
Forum
Replies
Last Post
Ricoswave
Evo Engine / Turbo / Drivetrain
17
Sep 21, 2019 02:13 PM
chrylaser
09+ Ralliart Engine/Turbo/Drivetrain
6
Oct 17, 2013 11:51 AM
luvboost
Mitsubishi TC-SST Discussion
8
Nov 17, 2010 03:10 PM