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Hi, I have a UK 2010 CITROEN C1 Evie, which is one of a batch of a few hundred new conversions done by the Electric Car company in the UK around 2009 to 2011. I had periods when the car wasn't used much and consequently the stand-alone 12v gel battery (which powers door locks and internal systems) became totally flat. I've removed the battery and recharged on a few occasions before, but recently I opted to charge the battery in-situ whilst still wired up. Big mistake!! The battery charged successfully but when I went to turn the ignition switch to 'on' the controller display is dead and the car obviously does not run. The brake servo pump runs, along with all internal electrics but the controller battery charge display is totally dead. The controller is a Curtis 1238 with its dedicated BDI display. I'm going to attempt further diagnosis shortly but wondered if anyone out there would have a clue as to what I should be checking first, and to whether I've totally fried the controller. I'm fairly good with electronic fault finding and appreciate the cautions to be observed working in the proximity to 130v electrics. The battery pack appears to charge OK when put on charge. Any help / advice would be really appreciated. Thanks!
 

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Hi, I have a UK 2010 CITROEN C1 Evie, which is one of a batch of a few hundred new conversions done by the Electric Car company in the UK around 2009 to 2011. I had periods when the car wasn't used much and consequently the stand-alone 12v gel battery (which powers door locks and internal systems) became totally flat. I've removed the battery and recharged on a few occasions before, but recently I opted to charge the battery in-situ whilst still wired up. Big mistake!! The battery charged successfully but when I went to turn the ignition switch to 'on' the controller display is dead and the car obviously does not run. The brake servo pump runs, along with all internal electrics but the controller battery charge display is totally dead. The controller is a Curtis 1238 with its dedicated BDI display. I'm going to attempt further diagnosis shortly but wondered if anyone out there would have a clue as to what I should be checking first, and to whether I've totally fried the controller. I'm fairly good with electronic fault finding and appreciate the cautions to be observed working in the proximity to 130v electrics. The battery pack appears to charge OK when put on charge. Any help / advice would be really appreciated. Thanks!
 

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Hi, Just seen your posting which I appreciate is quite historical now! I'm in exactly the same situation and did exactly what you did, same end result exactly. Just wondered how you rectified the situation? As you'll know, the wiring is all but impossible to trace through, a real rat's nest! My car has now stood on the driveway for over 2 years, was trying to trace the guy who specialises in these, Jeremy Bloomfield from Colchester but he now seems to have disappeared.
Any help or advice would be really appreciated.
Many thanks!
Graham
 

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It sounds to me like the controller is badly grounded by design in that vehicle (possibly brought to you by ex Lucas Electric people 😂 ). If it saw large (more than 0.5-0.7V) reverse voltage due to high inrush charge currents (poor charger regulation), it's likely toast.
 

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Doesn't the controller have an LED that will blink out error codes ? That would be the first thing to check.
 
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