battery connected wrong - MBClub UK

dax121 · 14-03-2012, 12:20 AM

hi guys
not sure if this is in the right section but the battery on my 98 clk was connected to the wrong terminals. no lights on dash now etc so im wondering what damage was likely done. im hopeing i just blew the relay in the booth but want to know what to check when i go at it

panason1c · 14-03-2012, 08:26 AM

I would check ALL fusebox fuses first, you might be lucky, otherwise, you may have caused major damage to any ecu's.....just hope its only a fuse issue.

andy27168 · 14-03-2012, 12:50 PM

Remember to check the fuses in the ECU box, which is on the opposite side of the engine bay to the main fuse box, but can,t help but think you have caused some major component damage.

neilrr · 14-03-2012, 12:54 PM

Don't these cars have some sort of OVP?

**jaymanek** · 14-03-2012, 02:03 PM

IF its fine and everything works then dont worry.

panason1c · 14-03-2012, 02:10 PM

Quote:

Originally Posted by jaymanek

IF its fine and everything works then dont worry.

err........but its not!

no lights on dash now etc so im wondering what damage was likely done

dax121 · 14-03-2012, 03:53 PM

all fuses are ok but i dont know about relays have no way to check. would the relay in the booth not have blown? i would imagine that would blow before ecu or should i say hope it would blow

panason1c · 14-03-2012, 03:59 PM

Is there a relay with a fuse above (it might have a cover over it) alongside or close to the battery?, this is the ovp relay, check the fuse and the relay.

**jaymanek** · 14-03-2012, 05:42 PM

ahh sorry i read that as there are no warning lamps on the dash...

Some models have a battery protection relay and/or massive fuse... Easy to spot.

dax121 · 14-03-2012, 06:53 PM

yes it does have a relay in the booth. i went to a auto factors butt they dont have one. ill try get to main dealers and buy one. hopefully it does the job

martyz · 14-03-2012, 07:14 PM

You could buy relays all day long and get nowhere ,check battery protection fuse first,if ok
you will have to fault find with meter and good circuit diagram,assuming you have electrical
experience,failing that contact an auto electrician.How did the battery end up reversed?

andy27168 · 14-03-2012, 07:27 PM

Have you checked the fuses in the ECU box under the bonnet, not the fuse box.

dax121 · 17-03-2012, 04:36 PM

ive checked all fuses they are fine. and the relay that i taught would be for the battery seems to be for the fuel pump. part number A0025421319 V23134-B52-X336.

DRBC43AMG · 17-03-2012, 05:12 PM

Something stupid perhaps, but have you checked the battery has available juice ?

Black c320 · 17-03-2012, 05:16 PM

How or why was the battery connected in reverse,and whilst it was connected at what point did you realise and connect correctly,

The amount of damage could depend on how long it was incorrectly connected.

Are any systems working i.e lights, starter, accessories etc.

14-03-2012, 12:20 AM	#1
dax121 New Member Join Date: Mar 2011 Car: clk Posts: 11	battery connected wrong hi guys not sure if this is in the right section but the battery on my 98 clk was connected to the wrong terminals. no lights on dash now etc so im wondering what damage was likely done. im hopeing i just blew the relay in the booth but want to know what to check when i go at it

14-03-2012, 08:26 AM	#2
panason1c Hardcore MB Enthusiast Join Date: Feb 2005 Location: Somerset Car: ML270CDI Posts: 834	I would check ALL fusebox fuses first, you might be lucky, otherwise, you may have caused major damage to any ecu's.....just hope its only a fuse issue.

14-03-2012, 12:50 PM	#3
andy27168 Hardcore MB Enthusiast Join Date: Nov 2004 Location: Southampton Car: 1997 C230K, 1999 C43/55 AMG Posts: 3,123	Remember to check the fuses in the ECU box, which is on the opposite side of the engine bay to the main fuse box, but can,t help but think you have caused some major component damage.

14-03-2012, 12:54 PM	#4
neilrr Hardcore MB Enthusiast Join Date: Jul 2004 Car: Various. Posts: 4,222	Don't these cars have some sort of OVP?

14-03-2012, 02:03 PM	#5
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,492	IF its fine and everything works then dont worry.

14-03-2012, 03:53 PM	#7
dax121 New Member Threadstarter Join Date: Mar 2011 Car: clk Posts: 11	all fuses are ok but i dont know about relays have no way to check. would the relay in the booth not have blown? i would imagine that would blow before ecu or should i say hope it would blow

14-03-2012, 03:59 PM	#8
panason1c Hardcore MB Enthusiast Join Date: Feb 2005 Location: Somerset Car: ML270CDI Posts: 834	Is there a relay with a fuse above (it might have a cover over it) alongside or close to the battery?, this is the ovp relay, check the fuse and the relay.

14-03-2012, 05:42 PM	#9
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,492	ahh sorry i read that as there are no warning lamps on the dash... Some models have a battery protection relay and/or massive fuse... Easy to spot.

14-03-2012, 06:53 PM	#10
dax121 New Member Threadstarter Join Date: Mar 2011 Car: clk Posts: 11	yes it does have a relay in the booth. i went to a auto factors butt they dont have one. ill try get to main dealers and buy one. hopefully it does the job

14-03-2012, 07:14 PM	#11
martyz Hardcore MB Enthusiast Join Date: May 2011 Location: New Forest Car: '99 S202 '91 W201 Posts: 1,003	You could buy relays all day long and get nowhere ,check battery protection fuse first,if ok you will have to fault find with meter and good circuit diagram,assuming you have electrical experience,failing that contact an auto electrician.How did the battery end up reversed?

14-03-2012, 07:27 PM	#12
andy27168 Hardcore MB Enthusiast Join Date: Nov 2004 Location: Southampton Car: 1997 C230K, 1999 C43/55 AMG Posts: 3,123	Have you checked the fuses in the ECU box under the bonnet, not the fuse box.

17-03-2012, 04:36 PM	#13
dax121 New Member Threadstarter Join Date: Mar 2011 Car: clk Posts: 11	ive checked all fuses they are fine. and the relay that i taught would be for the battery seems to be for the fuel pump. part number A0025421319 V23134-B52-X336.

17-03-2012, 05:12 PM	#14
DRBC43AMG Hardcore MB Enthusiast Join Date: Mar 2010 Location: Switzerland, Locarno (TI), the canton of merlot grapes, wine, grappa and fine food Car: 98' C240T, 99' C43 AMG "T Rex" Posts: 951	Something stupid perhaps, but have you checked the battery has available juice ?

17-03-2012, 05:16 PM	#15
Black c320 Member Join Date: Oct 2011 Location: Middlesbrough,North East,UK Car: 06 E280 CDI w211 Estate Posts: 90	How or why was the battery connected in reverse,and whilst it was connected at what point did you realise and connect correctly, The amount of damage could depend on how long it was incorrectly connected. Are any systems working i.e lights, starter, accessories etc.

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