Complete electrical shut down....
Posted: Tue Nov 21, 2017 5:02 pm
So my '69 S4SE Federal spec Elan has developed a worrying trait. A complete electrical shut down. No electrical power, no ignition lights, no starter - completely dead. The first time this happened I was driving the car for around 4miles and everything switched off (always interesting...). 5 or so minutes later it came back to life and then after leaving the car idling again for 10mins, it died again. So i suspect some kind of electrical overheating / thermal cut out. Car has an alternator.
Background; the car had recently had had the tacho converted to run electronic ignition. Previous to this the tacho was inoperable but no electrical cut outs and it always ran OK. I sent the tacho to be converted by Nisonger and followed their instructions and tacho now works fine. I have also noticed that the Voltage gauge rather than reading 13V or so, was now around 11V. Other oddities include running lights and indictors lights always on regardless of key / switch position (probably a bad earth and unrelated)
I discovered a loose connection in the fusebox and duly replaced but no change - switched off on the drive way after 10mins of idling. I did notice that the electrical cooling fan kept running so that is pulling 12v from another source to the other 12v systems.
Could it be the voltage regulator or is there something else that could overheat and cause the shutdown? As far as I know the only electric mods I made in fitting the tacho were the extra wire from the coil to the tacho and finding 12v power for it (could be this but it did appear to be an instrument feed...).
The general state of the wiring behind the dash is a little horrifying but all appears to be connected.
Any thoughts from the Elan electrical guru's would be appreciated.
Background; the car had recently had had the tacho converted to run electronic ignition. Previous to this the tacho was inoperable but no electrical cut outs and it always ran OK. I sent the tacho to be converted by Nisonger and followed their instructions and tacho now works fine. I have also noticed that the Voltage gauge rather than reading 13V or so, was now around 11V. Other oddities include running lights and indictors lights always on regardless of key / switch position (probably a bad earth and unrelated)
I discovered a loose connection in the fusebox and duly replaced but no change - switched off on the drive way after 10mins of idling. I did notice that the electrical cooling fan kept running so that is pulling 12v from another source to the other 12v systems.
Could it be the voltage regulator or is there something else that could overheat and cause the shutdown? As far as I know the only electric mods I made in fitting the tacho were the extra wire from the coil to the tacho and finding 12v power for it (could be this but it did appear to be an instrument feed...).
The general state of the wiring behind the dash is a little horrifying but all appears to be connected.
Any thoughts from the Elan electrical guru's would be appreciated.