Another 46 to 47 project!

[Richard48Y]

Check idle voltage compared to 1500 RPM voltage.

[DreamsOfA47]

I'll have to get that done this weekend so I can begin diagnosing the charging issues.

This of y'all who have non-stock alternators on your S1s and S2s what make and model did you go to? Considering my alternator is an unknown quantity I'm thinking of swapping to something that's known to work well. Thoughts? Ideas? Tips and tricks I should know? My searches have shown me a couple threads for TC stuff but nothing for the Renault powered cars.

[Richard48Y]

Almost every hot-rod now runs a three wire GM alternator.
Heavy wire to the battery and a two wire plug.
But kind of large to my way of thinking.
If my current alternator fails I intend to see about adapting the unit from a Geo Metro.
They are small in size but still put out decent power.

[jbcollier]

I’ve been installing Delco Remey 10SI alts for years.  Great output, simple to repair and easy to find parts for.  Mounting can be tricky sometimes with their long mounting lug.  I have one on my S1

[TurboFource]

There is also a small Kubota tractor alternator people use.

[DreamsOfA47]

Thanks, Gents I'll definitely start looking into those alternators!

I have a new frustration: the radiator fan! Those of you who have S2s and have had to replace the stock radiator fan relay, what relay did you use and how did you wire its in? I have a standard fan relay and I can't get the fan to work with the S2 harness. I've scoured the diagram but I can't seem to make it work. Any advice or how-tos? Those of y'all with S1s who have done similar any ideas as well?

[jbcollier]

Any 30-40 amp relay will work.  First test yours.  Power across BOB to RAD should make the relay click.  That should join BAT+ and MOT.

[DreamsOfA47]

The original relay has completely fallen apart and doesn't click when power is applied so I believe it to be kaput!

I've been trying to get a standard 5-pin relay to work but I can't equate the the wiring of the standard fan really with the S2 harness. I'm not sure if I'm not understanding the wiring harness itself and therefore can't equate the harness to the pins, or if I've just been staring at the diagram for so long I've stopped seeing details 

[jbcollier]

Can you post a photo of the relay you want to use?  Specifically the terminals and any numbering by them.

[DreamsOfA47]

Here’s the type of relay that I’m trying to use. I believe it’s just a standard fan relay. Mine isn’t a Bosch out it’s pin numbered and oriented the same way.

[jbcollier]

85 - green
86 - black to rad fan switch and red/black to interior fan switch
30 - purple
87 - power to rad fan
ground - ground to rad fan and ground for rad fan switch

If you are using an original rad fan, then power goes to the black wire and ground to the red wire.  If you are using an aftermarket pusher fan, then wire normally.  Always double check that air is being pushed through the rad.

[DreamsOfA47]

Well, gents I've come to a crossroads: either my fan is broken, I'm stupid, or I'm missing something on the harness and I just can't get the fan to turn on!  I have a new fan I think I'll ty and wire in and see if it can be made work before I endeavor to take the old one out. Also on my harness it seems as though I'm missing a ground wire. I have 2 black wires terminated together in a female spade terminal, as well as a black wire and a red-and-black wire terminated in female spade but that still leaves me short a wire that should go from the thermo switch to the relay so it seems.

On another electrical front I have a bundle of bullet terminated wires that I have no idea as to the function of. They branch off from the harness close to the wiper motor plug  toward the passenger side and I can't seem to find anything like them on the wiring diagram, except for the lights and blinkers and stalk controls, but there already seems to be those on the driver's side. Once again I'm completely stumped. Does Autosparks just double up the harness for LHD and RHD compatibility? 

[jbcollier]

Looks like it should go to a four-way flasher switch.

[Kendo]

Speaking as an electrical engineer (NOT an automotive electrician) are there fans that use the mounting bolts as ground? Maybe your fan assumes a steel car body?

[DreamsOfA47]

Kendo that seems entirely possible as a method grounding though I don't believe its used in the case for the Europa.

JB that's an interesting thought, but I've never seen fisher relay that used bullets before and a quick google search doesn't yield any results. Another really interesting thing is when the the red and green bullets touch the relay in the charging system clicks on and if the car is running and those bullets touch, the car stays running even with the ignition off and the key removed from the switch. That appears to have been the cause of the phantom ignition source! That being said I can't seem to trace the wiring harness from the relay to see what they may be for and I'm still just as stumped.