2007 9-5 100 milliamp parasitic draw on maxi fuse 2

1614 Views 40 Replies 11 Participants Last post by 1audio, 3 mo ago

scottj

Discussion Starter · 5 mo ago

I replaced the alternator, battery, and starter! I went to start my car this past Sunday, and nothing.

A local mechanic discovered there is a 100mA power draw on the maxi fuse 2.

This is what they wrote up:
---
TECH
TESTED MAIN WIRING AND FUSE ROUTING. CAR HAS 100 mA POWER DRAW KEY OFF ENGINE OFF.
MAXI FUSE 2 REMOVAL RETURNED A LOWER POWER DRAW.
FUSES POWERED UNDER MAXI FUSE 2 = FUSE 1, FUSE 20, FUSE 16, FUSE 17.
REMOVINGFUSE 17 RESULTED IN FURTHER DROP OF POWER DRAW.
FUSE 17 RUNS MAIN INSTRUMENT UNIT (DASHBOARD INTEGRATED CONTROL ELECTONICS MODULE)
Cause -

DICE MODULE IS MAIN SUSPECTED CULPRIT, THEFT CONTROL MODULE AND ENGINE CONTROL MODULES ALSO SUSPECTED IF DICE MODULE PASSES DIAGNOSTICS.

CUSTOMER RECOMMENDED TO REGULARLY DRIVE CAR, UTILIZE BATTERY TENDER WHEN PARKED, OR
INSTALL BATTERY CUT OFF SWITCH.
---
Any thoughts on what it could be? Would the SID module affect this? There are no interior sounds (turn signal, open door, etc.) The trunk light is off, and I turned the interior lights off. Or is a cut-off switch my best/cheapest option?

Thanks,
Jeff

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wdssaab

· #19 · 5 mo ago

Would you be saying to use something like alligator clips to the + battery terminal then pull the fuses individually to get readings after some timeframe to allow the functions to sleep? Yes I'm the PO of said SAAB!

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wdssaab

· #33 · 5 mo ago

Interesting, I (wdssaab) have had the car for a week and kept it on a battery tender with all fuses intact, so there was no overnight discharge. I took it to my SAAB mechanic this morning and got a call that the drain was normal less than 50 mA. They are going to keep it overnight to see if it does drain the battery. Could the week with the 1amp battery tender "fixed" the problem? Tomorrow morning will tell.

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wdssaab

· #34 · 5 mo ago (Edited)

As mentioned in the previous post the local SAAB shop kept it overnight for two nights. They found the power drain to be normal. They suspected the "no name" battery could partially be the culprit as CCA's were not listed. Afterwards I had the car for another few days without the battery tender attached. I had no problems while driving it daily. The 9-5 has been returned to the OP living in a slightly colder area of the state. One of his driving habits was putting it neutral and coasting down some long hills, I wonder if he could have picked that up from an older Saab 95 (free wheeling) driver 😁 ?

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wdssaab

· #36 · 5 mo ago

bob3000 said:
I'm confused...you say you had the car but then your follow up is "the shop" and "they" and then you are daily driving it?...whatever, it was never broken and we are all "free wheeling". 😁

Ok the timeline. My son owns the 2007 SAAB and was having the battery drain i.e. post #1. I live near one of the nationally known SAAB independent shops so I got the SAAB and had it for a week before getting an appointment, that was when I kept it on a battery tender, and no problems. The shop had it for a few days to diagnose the problem. In the end the shop determined the drain was normal but couldn't find out much information (CCA) on the installed battery, so suspected it was possibly the problem. After getting it back from the shop I drove it for another few days without using the battery tender with no problems with 7-10 mile trips. With respect to the freewheeling, my son does a lot of coasting down hills with the car in neutral so the engine is at idle rpm. I assume the battery not being recharged at 900 rpm thus is at a lower state of charge when it comes time to start the next day. What do you think?
My 71 95 has freewheeling so while he was learning to drive with it there were lots of freewheeling opportunities, so he (and I) continued on with the newer SAABs by putting it in neutral as opportunities arose.

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