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Discussion Starter #1
Its seems a bit skechy but can anyone confirm there is a relay under the tank thats for the reverse module or is it inside the module itself left side of battery i just have a flashing r on my dash when flicked to r on the knob it ingages but nothing at all on the starter switch
Thx in advance
 

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Its seems a bit skechy but can anyone confirm there is a relay under the tank thats for the reverse module or is it inside the module itself left side of battery i just have a flashing r on my dash when flicked to r on the knob it ingages but nothing at all on the starter switch
Thx in advance
In looking at my Clymer manual, I don't see any reverse specific relay shown or listed being in the electronics box under the tank or on the reverse controller schematic pages.
 

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Wrencher Extraordinaire
2005 K1200LT
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No relay. Usual cause for a flashing light is that an interlock has not been satisfied. Engine on, side stand up, not on center stand, in neutral and brakes released?
 
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When John Z speaks, LT owners need to listen... He is an expert on the LT, and one of the most knowledgeable people on this forum (and in North America). :bmw:
 

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Thx for the reply , where wud the relay be is it in the module its self
If you are looking for a relay associated with reverse to needlessly swap, there is one under the tank in the electrics box and it just so happens to be the starter relay. If you bike does start, then there is nothing wrong with that relay and the crack you heard when you plugged in the barrel plug with the ignition on and heard a crack as you mentioned in the first thread you asked for help on was likely your reverser module frying.

I would do as John Zeller said and check the interlocks associated with reverse functionality but since the bike does start, I wouldn't put much hope into that being the issue.

I hope you can find a used module to replace the one you have to test with as they are pretty costly new.

Good luck Craig.
 

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Discussion Starter #7
Thx for the reply ive tried all the interlocks as u said but still same , bike starts perfectly , so ive removed the module and just waiting on the replacement from you country will update when it arrives thx for ur help guys

Regards craig
 

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Thx for the reply ive tried all the interlocks as u said but still same , bike starts perfectly , so ive removed the module and just waiting on the replacement from you country will update when it arrives thx for ur help guys

Regards craig
Is there any burned smell coming from the module now that you have it out? Just curious if it smells like it fried something inside.
 

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2005 K1200LT
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If there is a relay anywhere it is inside the reverser controller. It drives the dash light directly for the "R".
 

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This is the relay/solenoid what i think is faulty from the reverse module , ive tested with 12v to the two small terminals but the thing is dead
Trying to find one is proving difficult it is a denso solenoid 182800-3410
Do you have a meter to measure resistance across the small terminals? Does that measure an open circuit?

Also measure from the small terminals to the case and also to and across the large terminals. Never looked inside a reverse module before.

There are all types of starter relays that might replace that but they likely would not fit inside the reverse module. Would have to know if it is normally open or normally closed.
 

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This is the relay/solenoid what i think is faulty from the reverse module , ive tested with 12v to the two small terminals but the thing is dead
Trying to find one is proving difficult it is a denso solenoid 182800-3410
BMW is famous for using parts custom made just for them with a contract that precludes sale to anyone else. Since the 182800 family is easy to find, I suspect the -3410 is the BMW unique part. It appears to be a four terminal device rather than the more common three terminals. Maybe BMW really needs isolation of the grounds, but I would check to see if either control terminal is common to the metal case. If it is, that might let you use a three terminal relay, but the risk is that ground potential changes/transients might damage other parts of the module.

Is the module itself made by BMW? Or is it a supplied part? If the latter, might try them for a relay, although expect them to be unable to sell to you due to legal constraints from BMW.
 

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BMW is famous for using parts custom made just for them with a contract that precludes sale to anyone else. Since the 182800 family is easy to find, I suspect the -3410 is the BMW unique part. It appears to be a four terminal device rather than the more common three terminals. Maybe BMW really needs isolation of the grounds, but I would check to see if either control terminal is common to the metal case. If it is, that might let you use a three terminal relay, but the risk is that ground potential changes/transients might damage other parts of the module.

Is the module itself made by BMW? Or is it a supplied part? If the latter, might try them for a relay, although expect them to be unable to sell to you due to legal constraints from BMW.
It may be the same relay and only a mounting option. The 182800-2280 looks very much the same except for the attached bracket.
 

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Discussion Starter #15
Ye i saw that one im sure that this is my problem the module is made by denso with a bmw label on it im going to try denso see if i can locate one ☝
 

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2005 K1200LT
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The purpose of that relay is to isolate the reverser from the starter since the Black sleeved wire is always connected to the starter. The trigger voltage closes that relay to send the output of the controller to the starter motor during reverse and isolates it during starting. You could adapt a larger Ford relay in its place outside of the controller if you can't find one that will fit inside.
 

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Thx for the reply might have to do that
If you go the Ford relay route, be careful as on those, one of the small terminals is usually connected to the mounting bracket ( Ground) so it will work in a 3 wire and a 4 wire configuration. That could cause you trouble unless you isolate the mounting.
 

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Discussion Starter #19
Got my replacement reverse module from the usa , fitted it works perfect had the relay stroke solenoid tested off the old one and it was dead but i now have reverse again 👍🏻👍🏻👍🏻
 
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