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Old 07-07-2020, 09:57 PM   #1
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Battery Temperature sensor replacement.

I've got an 05 Essex with a defective battery temp sensor. Replacement seems pretty simple, except snaking the wire through. Has anyone else replaced theirs and can you offer any insight on the wire snaking??
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Old 07-07-2020, 10:29 PM   #2
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Did it on my PT. Just used a hard elec snake and pushed it thu the center area between the rails from the back to the front. Used that to pull a string thru and then pulled the sensor from the front to the back. Tried the other way but it seemed to hang up. My sensor was fairly large but had a rounded “ tab” on the front that I believe helped me get it thru
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Old 07-07-2020, 11:46 PM   #3
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Why do you think it is bad? I once thought mine was bad and decided otherwise.

Any chance you have a newer magnum inverter?
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Old 07-08-2020, 08:40 PM   #4
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Why do you think it is bad? I once thought mine was bad and decided otherwise.

Any chance you have a newer magnum inverter?
I'm 99% sure my inverter is original. Problem was my batteries would only charge to about 12.3 volts. Both Magnum and some folks on this board suggested I disconnect the temp sensor and see if the voltage went up. I did and it did!
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Old 07-08-2020, 08:43 PM   #5
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Maybe to simplistic but can you just cut the old wires and splice in the new sensor. I've never replaced one so I am no expert but soldering the wires together should give a good connection. I know it's a phone type wire but even those can be spliced.
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Old 07-08-2020, 09:48 PM   #6
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Quote:
Originally Posted by DandyDon View Post
I've got an 05 Essex with a defective battery temp sensor. Replacement seems pretty simple, except snaking the wire through. Has anyone else replaced theirs and can you offer any insight on the wire snaking??
I recently had to replace mine as well, 2019 with less than 5k miles.

I bought a phone cord connector kit with crimper, and a female to female connector.

I cut the original wire in the battery compartment, crimped a new end on it.

Installed the new BTS cut all the excess wire off, crimped on a new end, and plugged it together, now it is serviceable without fishing wires.

Ted.
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Old 07-09-2020, 05:12 AM   #7
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I recently had to replace mine as well, 2019 with less than 5k miles.

Ted.
Ted,

What symptom were you having that led to you finding out your's had gone bad?

- Richard
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Old 07-09-2020, 07:04 AM   #8
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Ted,

What symptom were you having that led to you finding out your's had gone bad?

- Richard
Batteries were not charging, go to your Magnum energy panel and look at the battery temps will read really high so no charging.

Ted.
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Old 07-09-2020, 12:43 PM   #9
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Quote:
Originally Posted by DandyDon View Post
I'm 99% sure my inverter is original. Problem was my batteries would only charge to about 12.3 volts. Both Magnum and some folks on this board suggested I disconnect the temp sensor and see if the voltage went up. I did and it did!
I had this exact scenario as you experienced. Disconnected the BTS at the inverter and like you the charge voltage returned to normal.

For replacing the old sensor and cable, I was able to cut the old sensor head off, tape the new cable to the old cut end, and pull it through by pulling from the inverter end. Might be worth a try before attempting to splice.
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Old 07-09-2020, 01:23 PM   #10
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Originally Posted by Vickie 4369 View Post
Batteries were not charging, go to your Magnum energy panel and look at the battery temps will read really high so no charging.



Ted.


Thanks Ted,

Having the same year Ventana had me wondering what I needed to start checking for on a periodic basis.

- Richard
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Old 07-09-2020, 01:54 PM   #11
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Thanks Ted,

Having the same year Ventana had me wondering what I needed to start checking for on a periodic basis.

- Richard
You are Welcome!

It may have been my fault, I washed my battery bay LOL

Yes periodically check the BTS readings should be close to ambient.

Ted.
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