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Old 05-17-2006, 01:27 PM   #1 (permalink)
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K40 relay circuit and associated

The famous K40 and surrounding components. Inc Fuel Pump relay and fuse inc in K40 as far as I can make out
Location in main component box next to battery.

http://www.classic-roadster.de/cgi-b...T=ITEM&START=K

Bazzle
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K40 relay circuit and associated-k40a-.jpg   K40 relay circuit and associated-k40-.jpg  

Last edited by Bazzle; 03-13-2008 at 02:52 AM.
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Old 05-17-2006, 05:38 PM   #2 (permalink)
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you're the best!!!!!!!!!!!!!!!

thankx
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Old 10-05-2006, 12:37 PM   #3 (permalink)
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Man, you guys rock!!! Thanks for all the great posts!! I followed threads for my engine light codes...came across this one on the k40. here is what i found...
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K40 relay circuit and associated-k40-1.jpg   K40 relay circuit and associated-k40-2.jpg   K40 relay circuit and associated-k40-3.jpg  
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Old 10-05-2006, 12:39 PM   #4 (permalink)
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I'm going to re-solder the burnt out sections. Hope this fixes my issues.

Thanks again!! If it wasn't for this forum, I would have never come to this conclusion.

Thank Allah for this forum!!

Thanks guys!

-Zo
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Old 10-05-2006, 05:17 PM   #5 (permalink)
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Zo........excellent pics

It would be interesting to know what part of the circuit is burning out these
solder joints.... probably near impossible to determine unless you are an electronics engineer

I wonder if these are the same joints others have had to resolder

This thread now deserves a 5 star rating

Good luck with the fix.......please be sure to give feedback if it fixes your issues

David

Last edited by David in Australia; 10-05-2006 at 05:45 PM.
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Old 10-05-2006, 08:25 PM   #6 (permalink)
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Deserves to be a sticky for sure.
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Old 10-05-2006, 08:38 PM   #7 (permalink)
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Quote:
Originally Posted by David in Australia
Zo........excellent pics

It would be interesting to know what part of the circuit is burning out these
solder joints.... probably near impossible to determine unless you are an electronics engineer

I wonder if these are the same joints others have had to resolder

This thread now deserves a 5 star rating

Good luck with the fix.......please be sure to give feedback if it fixes your issues

David

Do you think it could be part of the Tip Start Circuit?
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Old 02-21-2007, 10:55 AM   #8 (permalink)
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i never replied back to this post.

The fix worked and I haven't had a problem since then. Hope this helps others as well.
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Old 02-22-2007, 09:27 AM   #9 (permalink)
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From the looks of the PCB board, something is generating too much heat.
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Old 02-22-2007, 10:54 AM   #10 (permalink)
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Its the current flow to the fuel pump. The orig soldered joints probably cracked (not an uncommon occurance) and the joint resistance increases. This is then a progression of heat, oxidisation etc until the soldered joint fails.

Bazle
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