Electricial help

2006 tacoma 2.7 4 cylinder
Big 3
Front battery agm.
Rear battery agm
Connected all with 1/0 ga wire power and ground.

Truck Has 188k miles

My question if my truck sits for 2 to 3 day and I go for turn it on and has a slow turn over is it bad and what causes ot how I fix it?

The truck starts and voltage Will recharge 14.0


Alt change 2 year ago
Battery about 3 gotta check

Is my starter going?
Cause if I drive it and drive it the next day it will start up with no hesitation


I'll drive it sat to Wed sit Thursday Fri then drive it again sat morning. That my routine

 

I would check the batteries
Check for a draw
Check alternator output

 

What you mean check for a draw?

 

A parasitic draw…

 

What that be though

 

A parasitic draw is a type of electrical current drain that occurs in a vehicle when the ignition is turned off. It is called a parasitic draw because it continues to drain power from the vehicle's battery, even though the vehicle is not in use.

 

Meaning something in the the truck that is staying on/consuming power when the truck is off, there should be no more than a 50mA (0.05A) draw when the truck is off.

 

https://youtu.be/lRcj1fQcWwU?si=AdMnR7_H7QrGBDpg

 

What the best way to figure it out and fix it

 

First need to determine if you have a drain, easiest no tools required way is to unhook the batteries, let it sit the length of time it is taking to drain them, then check them. If one or both are still dead then it's a battery issue, if not you have a drain killing them.

The other way is with a clamp-on or in series ammeter to measure the actual current leaving the battery.

https://youtu.be/bS6xak6Xmyo?si=QMCYmbu8dCamaOla

 

Front battery 3 yrs old rear is 4 to 5 yrs

 

So it very well could be a battery.

Where I live (very hot climate) 2-3 years is about the average lifespan of an automotive battery, 4-5 years at most. In cooler climates they tend to last longer.

 

Live hawaii soo


Well when have time this week, gonna change both out for a lead acid since I haven't had sounds for a while. What better napa or oreillys?

 

Costco

 

Ok so please describe symptoms of these going bad


Battery


Alternator


Starter


Thanks

 

Also had both on separate battery tender and soon as I took it off it drop to 70% for front and rear be 67%. Also tried reconditiong both battery

 

How do you fix the parasitic draw?

 

This was beginning of this year

 

AGM battery needs higher voltage to charge properly or will shorten its life..try the GM diode to boost alternator voltage ...easy fix replace fuse with diode 5 min.fix check out. adventure 4x4. YT video ... I would start here first then ..proceed to parasitic drawl if needed.

 

Might be alternator got new battery. Why when drive come complete stop at light it will drop to 12.8- 13.1 then go back to 14.3. If at stop it will also have a rough idle.