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GreenMech Quad Chip 160 MK I


hesslemount
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Do you have battery voltage at the heavy red in the junction box  ?

If not then check the 40 amp fuse. 

If you have voltage then carefully lift up the two left hand wires where they are folded over in the 'head unit' strip plug. I think they are red and pink ?

With the ignition turned on , put your positive probe of the multimeter on the small contacts that appear in the strip plug where you lifted the folded wire from and check the voltage  , it should be from memory approx 18 volts ?

This is because the box multiplies the voltage up.

If in doubt the turn the ignition off and back on and re check. 

If there is little or no voltage here then it's unfortunately the junction box that's faulty. 

Jase.

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It seems I’m getting zero voltage on the 2 pins (1 & 2) on the head unit labelled  “POWER +V” see diagram. When I originally plugged in I was 1 plug to the right which seems to have been the start of the power problem when I was trying to solve the roller problem! The earth wire is tight and intact. All fuses are intact. Is it possible to repair PCB’s. There’s no actual visual sign of damage. 

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Do all the connections go via that green anodised aluminium Amphenol connector underneath?.

 

Might be worth continuity checking as old Amphenol connectors were all solder joints, it's old school and a right PITA to repair.

 

Atleast that way you know it's more likely the board than anything else.

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So the problem was caused most definitely by me or as my girlfriend said, doing a Prince Andrew and tampering where I shouldn’t! So when I unplugged and plugged the head unit back in I went one plug too far to the right and managed to fry a diode. I disengaged the whole junction box and took it to

WWW.NOVA-ELECTRONICS.CO.UK

Sample

They’re based in Sheffield  and charged only £35 for a fix that took them 1-day. Plugged it all back in and hey presto it worked. So be very careful when messing in the junction box that you plug back in correctly as the space between the pins is small and it’s possible to cross over very easily. Ensure you disconnect battery too which I’m guessing would have saved me all this trouble. 

Edited by hesslemount
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