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Battery Drain? Battery Drain?
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  #101  
Old 02-07-2021, 06:15 PM
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satnav dvd player or cd changer, mine was switching itself on for no reason
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  #102  
Old 04-07-2021, 01:06 PM
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You can buy an "Amp-Hound" test meter on Amazon or you can get this circuit amp draw meter at Harbor Freight for a lot less.

https://www.harborfreight.com/30-amp...xoCemMQAvD_BwE

Here's a video on how to test the circuit with an Amp Meter.
https://www.youtube.com/watch?v=UEYGmSn01Bw
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  #103  
Old 09-02-2021, 10:59 PM
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I've noticed the battery voltage dropping abnormally lately. Walked past the X 8n the garage and noticed the light was on by the shifter which it was not doing before so it is not going to sleep properly. I dont have any radio, navi or amp connected anymore. What else can be keeping it awake?
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  #104  
Old 09-02-2021, 11:01 PM
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Usually the FSU.
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  #105  
Old 09-02-2021, 11:06 PM
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Quote:
Originally Posted by andrewwynn View Post
Usually the FSU.
FSU as in blower motor resistor?
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  #106  
Old 09-02-2021, 11:51 PM
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Quote:
Originally Posted by Purplecty View Post
I've noticed the battery voltage dropping abnormally lately. Walked past the X 8n the garage and noticed the light was on by the shifter which it was not doing before so it is not going to sleep properly. I dont have any radio, navi or amp connected anymore. What else can be keeping it awake?
Do you have a TCU? Bluetooth. They are known to sometimes not go to sleep.
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  #107  
Old 09-02-2021, 11:55 PM
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Quote:
Originally Posted by Fifty150hs View Post
Do you have a TCU? Bluetooth. They are known to sometimes not go to sleep.
My 02 does not have a TCU or factory Bluetooth.
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  #108  
Old 09-02-2021, 11:56 PM
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Quote:
Originally Posted by Purplecty View Post
My 02 does not have a TCU or factory Bluetooth.
That leaves the FSU as the likely culprit as Andrew suggested.
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  #109  
Old 09-03-2021, 01:06 AM
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Battery Drain?
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Originally Posted by Purplecty View Post
FSU as in blower motor resistor?

Haven't seen a blower resistor since the 80s but the 21st century equivalent yep. FSU stands for final stage unit. It controls the power to the blower.

It gets power all the time so when it fails it can pull power always. More often than not, it will still function ok it just never shuts off.
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  #110  
Old 09-03-2021, 07:21 AM
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Whuch fuse powers the FSU so I can pull it while its in the garage and see if it goes to sleep?
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