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Old 11-27-2013, 02:09 PM   #1
Captain Yesterday OP
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/5 starter relay

Looks like my starter relay took a dump, looking to replace it with a bosch generic relay 12v 20amp

Based on this site http://bmwmotorcycletech.info/slash5cricket.htm

Not sure on the re wire the numbers on the replacement relay are different from the web article, I have 85, 86, 87, 87a, 87, 30?

Anybody have any experience doing one of these swaps?
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Old 11-27-2013, 04:52 PM   #2
DiabloADV
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A generic will not have the circuit that keeps you from hitting the starter while the motor is running. It's explained in that snowbum article you linked.
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Old 11-27-2013, 05:02 PM   #3
elite-less
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I run this Bosch relay (0 332 019 150) on all my /5's. They're so cheap, and small, I install two for a belts and suspenders approach.

Untitled

It will bypass the starter protection... as mentioned by DiabloADV.

If your harness is stock… wiring should be as such:

85 - Brown
86 - Green
87 - Double Red
87 - Red
30 - Black

You'll also need to add a jumper wire to connect the blue connectors.

.
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elite-less screwed with this post 12-12-2013 at 11:50 AM
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Old 11-27-2013, 05:29 PM   #4
Captain Yesterday OP
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Sweet it works, Thanks

125$ for a relay is about as crazy as 500$ for 70's ducati turn signals

Also, I'm not running turn signals, so there should be less of a chance of hitting the starter when the engine is running.
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Old 11-28-2013, 11:21 AM   #5
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Motorrad Elektrik carries a good relay for $10.



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Old 11-28-2013, 03:34 PM   #6
blaine.hale
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What symptoms does "dump" entail? Is it just clicking the starter like crazy?
Might be able to fix it with this super cheap mod:
http://www.advrider.com/forums/showthread.php?t=935824
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Old 11-30-2013, 02:48 PM   #7
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OP - just be careful with these bosch starter relays. As many have said, it bypasses the circuit that prevents the starter from being activated when the bike is running - that was by design by Bosch and implemented by ze Germans for good reason. If you are 100% certain you would never push the starter button while the bike is running, even on accident (which I find unlikely), you are better off doing the mod snowbum suggests (my brother and I did it, works great), or putting in a used starter relay from the flea market.
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Old 11-30-2013, 10:56 PM   #8
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Quote:
Originally Posted by elite-less View Post

You'll also need to add a jumper wire to connect the blue (turn signal) connectors.

.
Those blue wires at the starter relay are the charging light and diode board circuit, not turn signals. That's how the relay "knows" the motor is running.

You definitely need to jumper those or the bike won't charge. A jumper is built into the /6 relay to do just that.
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1970 R60/5
1981 R80G/S Renovation under way. For sale Spring '14
'91 Bill Holland Steel w/Dura Ace

'01 Z3 3.0 Coupe. The Clownshoe.
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Old 12-01-2013, 10:55 AM   #9
Michel77
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Quote:
Originally Posted by DiabloADV View Post
Those blue wires at the starter relay are the charging light and diode board circuit, not turn signals. That's how the relay "knows" the motor is running.

You definitely need to jumper those or the bike won't charge. A jumper is built into the /6 relay to do just that.
+1 at the above, mine were disconnected at the relay and it didn't charge. It seems there is some confusion on the purpose of these wires as I was initially also informed that they were turn signal wires.
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Old 12-01-2013, 11:50 AM   #10
Big Bamboo
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Quote:
Originally Posted by Michel77 View Post
+1 at the above, mine were disconnected at the relay and it didn't charge. It seems there is some confusion on the purpose of these wires as I was initially also informed that they were turn signal wires.
Sorry about that, I was referencing the info posted above.
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Old 12-01-2013, 04:06 PM   #11
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Great catch! That'll learn me from leaning on me memory!
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Old 12-01-2013, 06:00 PM   #12
Michel77
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Originally Posted by Big Bamboo View Post
Sorry about that, I was referencing the info posted above.
Hey, no worries man, thanks for chiming in when I posted.
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