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Author Topic: Check Control (fuse 7) draining battery  (Read 2246 times)

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JohnSmith

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Check Control (fuse 7) draining battery
« on: 26 September 2016, 14:00:40 »

Hello, I have a problem with the "Check Control" (fuse number 7) which is draining the battery. I measured 0.27 Amps, and with the fuse disconnected 0.04 Amps. The battery is drained within a week. The battery has been replaced 2 times already. I have the negative pole disconnected now. What could be the cause of the check control to keep using electricity? Would it help to do a diagnostic test with an OBD device such as this one? >> http://www.xxltech.com/
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Doctor Gollum

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Re: Check Control (fuse 7) draining battery
« Reply #1 on: 26 September 2016, 14:14:46 »

Does the car have a towbar socket?
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JohnSmith

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Re: Check Control (fuse 7) draining battery
« Reply #2 on: 26 September 2016, 14:27:22 »

yes I think so.. why?
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Re: Check Control (fuse 7) draining battery
« Reply #3 on: 26 September 2016, 15:24:39 »

Could be a short in the trailer socket... equally, if a genuine towbar wiring loom was fitted, there may well be a check control module fitted in the boot, if this is faulty it may cause your issue :-\
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JohnSmith

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Re: Check Control (fuse 7) draining battery
« Reply #4 on: 26 September 2016, 15:43:34 »

I don't know.. the check control module is pretty well documented in the user manual.. and nothing is said about the towbar socket.. see pages 40-42
Quote
The check control monitors fluid levels, front
disc brake pad thickness, the functioning of
the automatic transmission 3 and the
automatic headlamp range adjustment 3 as
well as important exterior lamp bulbs,
including the wiring and fuses.
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Re: Check Control (fuse 7) draining battery
« Reply #5 on: 26 September 2016, 16:24:15 »

If you fit a genuine GM towbar wiring kit, it uses (depending if the car has check control or not) a secondary check control unit for the trailer lights :y

Your car has check control. Therefore if a genuine towbar loom was correctly fitted it will have a second check control module in the left hand side of the boot, attached to the back of the wheel arch.

When I say tow bar socket, I mean the socket(s) attatched to the tow bar.
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JohnSmith

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Re: Check Control (fuse 7) draining battery
« Reply #6 on: 26 September 2016, 18:12:58 »

Yes I have a genuine GM towbar, because on the plastic cap of the socket it says: "GM".. So that's good to know, thanks!

Would there be a way to check if the primary check control is functioning properly?.. I guess I could disconnect a light bulb and see if an error message appears on the display?
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Re: Check Control (fuse 7) draining battery
« Reply #7 on: 26 September 2016, 18:39:05 »

I would start by testing the trailer socket :y
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JohnSmith

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Re: Check Control (fuse 7) draining battery
« Reply #8 on: 26 September 2016, 20:14:09 »

ok thanks.. would this be a good guide about how to that? >> https://caravanchronicles.com/guides/13-pin-socket-basic-fault-finding/
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Re: Check Control (fuse 7) draining battery
« Reply #9 on: 26 September 2016, 20:24:56 »

Looks comprehensive  :y

Give it a go, and report back...
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Boatboy

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Re: Check Control (fuse 7) draining battery
« Reply #10 on: 27 September 2016, 21:29:38 »

I've been going through this myself recently, though I think its just a dieing battery in my case.

Just a thought though, when I measured my current it was about 250ma, but after 10 mins or so stood chatting to a mate it dropped to 30ma. Is that what check control is supposed to do?

Up to that point I'd been pulling fuses like buggery & cursing the day I scrapped the Dolomite with its two big fuses.
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Re: Check Control (fuse 7) draining battery
« Reply #11 on: 27 September 2016, 22:41:00 »

I've been going through this myself recently, though I think its just a dieing battery in my case.

Just a thought though, when I measured my current it was about 250ma, but after 10 mins or so stood chatting to a mate it dropped to 30ma. Is that what check control is supposed to do?

Up to that point I'd been pulling fuses like buggery & cursing the day I scrapped the Dolomite with its two big fuses.
Check control is merely a bulb and fluid reporting system.

That drop in current was caused by the consumer relay switching off. Your numbers don't sound right iirc, but the behaviour can be considered normal ;)
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Re: Check Control (fuse 7) draining battery
« Reply #12 on: 27 September 2016, 23:00:00 »

Cheers.
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