Originally Posted by
GraphiteGhost
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Finally got hit with the RCM/No start issue! The three 'twin' pins spots near PCB top left edge (looking at PCB bottom with fuses facing away under where the Air Pump relay is), center one and right one, cold solder joints. VERY hard to see, hardly visible fine cracks completely around the pins, had to use a magnifying headband. I suspect IF more solder was in the 'tray' when this slid along during production, it would have not separated. Regardless, this was not visible with a naked eye. Thought mine was immune to this due to improvements in design/fixes in production BUT, there WAS this black 'magic marker' letters/numbers on top of PCB board where that 6th relay position was. COULD this RCM have been an older one either in stock or returned/fixed (and then installed during vehicle assembly)? Down below diode, an 'ou' was there (at @ neg band) and something like a '97h' (really could not make it out exactly) was about centered on where the relay would have been mounted. Anyway, after the freeflow of new solder (prepped by sucking most of old out), beautifully bright silver across all three 'twin' pins spots. Started right up as 'start' was engaged. Inspection and continuity testing of all relay coils and contacts, passed 100%. Another successful job well done (patting back)!
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UPDATE! Updating here with new information and results!
Guess I posted #6618 here too soon... Over the last 9 days had recurring problems finally explained in new post (
https://www.crossfireforum.org/forum...sue-alone.html ). I had gone into this RCM over and over even 'burnishing' the 'not-so-bad' relay contacts. Nothing worked, had to tap the box next to battery to sometimes get it to work. Tried jiggling the various modules in the box (with the RCM outside it), nothing... Finally (
see NEW post and pictures) found the culprit. Humbling, posting that I fixed it (too soon), quite unsettling to me.
I need the pigtail/connector with about 6 inches of wire (to splice correctly), for the 5 wire plug! IF anyone has continuous RCM no start, might want to check these connectors (BUT you'll have to
pop off the 'side' clips)
MAKE SURE YOUR BATTERY IS DISCONNECTED (Neg Cable) before you open up any of those connectors. Also, before opening the plugs
TAKE CLOSE UP PICTURES of each connector WITH the color codes AT each slot/pin. Sure hope no one else has this happen to them, it was quite a troubling fix, who would have thought
3 pins would break INSIDE a plug? This IS the first this EVER happened to me in my 50+ years in engineering, electricity, and electronics!
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