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Testing capacitors needs specialised equipment. Multimeters can give an approximate measure of a capacitor's health, but I prefer to work on the "test by substitution" method; if a different one works, the other one must be broken! I think older equipment was better designed and tends to last...

........Quick change of filters & fluids-it'll be as good as new........ :doh:

Your light bulb wiring looks right. How old is the capacitor? Try the same tests with the capacitor disconnected & see if the bulb goes out and on then.

If there's no spark at the points at all and your lightbulb is always lit then there's no electricity going through them or they're not opening and closing properly. With the points OPEN the fixed part (that's the part that doesn't move) should be earthed. To confirm this, connect one of your...

If the bulb remains alight the points are not closing or are not clean enough to pass the current, assuming you've connected the bulb correctly. The bulb lights when the points are OPEN because the electricity cannot pass through the points, so it has to go though the bulb, lighting it in the...

I would proceed as follows, eliminating one thing at a time, so that you'll know what change has caused the difference (if any!) First, are you certain that all the diesel's been cleaned from the carb? If you're not sure, using an aerosol carburettor cleaner should help. Did you remove the...

Dealing with the consequences of inadvertently adding diesel's not as simple as draining the tank & cleaning the carburettor! You'll probably find you'll need new plugs as well, as the diesel can react with the electrodes. By feeding fresh petrol into the carburettor directly from a can, you can...

I've a set & I'm in Barnet, if that helps.

You've several options: The best one is to buy some P43T 60/55 watt halogen headlamps, and then buy some selective yellow glass caps and slide them over the bulbs. These will fit into a Renault 4's headlamp unit, giving that characteristic "French" look to the car, and with bright halogen...

A small piece of rubber, perhaps from a tyre inner tube, cut to fit and wedged in place behind the fitting?

In my opinion the CO level you quote is too low. I believe the correct volume is about 3-4% and too lean mixture can cause burnt valves, regardless of the lead content. Before altering the ignition timing I'd enriched the mixture a tad and see how the car runs then. Do bear in mind that...

The law (in the U.K.) requiring indicators to be amber came into force in September 1965, although many vehicle manufacturers implemented the change well before that. Previous to this, some cars were fitted with clear 5/21 watt bulbs at the front, where the 5 watt filament was the side light and...

Follow the accelerator cable and see where it's connected to the carburettor; a screw adjuster near this point is the slow running adjustment, and winding this screw in increases the tick-over speed and vice versa. Further away from this screw, lower down on the carburettor is another screw, and...

I can recommend Carburettor Exchange, in Leighton Buzzard, who have done refurbishments for me in the past: https://www.carburetterexchange.co.uk/

Continuity testing is usually marked by an Omega symbol, the highest setting is normally 2M ohms. To test you're on the right setting, touch the two terminals together and the meter should read "O" and when apart they should read "1", which means when touched there's NO resistance (dead short)...

The only definitive way to confirm whether the points are functioning correctly is to remove them from the vehicle, but if this is impractical, one can proceed as follows: disconnect the lead that runs from the distributor to the coil and attach one of the lead from the multi-meter to it. Now...

Just a thought, but are you sure the ignition's functioning correctly? If there's a "hiccup" as you depress the accelerator the problem may lie with a worn out condenser/capacitor. On tick-over the capacitor can handle the current, but as the revs increase the rapid loading and unloading becomes...

Let's have some pictures of your 1962 Renault!

Most accessory shops sell a universal radio holder, which can be attached to the underside of the dash or to the front of the heater box. The radio/CD player would slot into this in a metal casing-it's not tricky. As to wiring it up, the aerial's the hardest bit, as this involves drilling a...

Spraying a liberal amount of aerosol lubricant through the hole might help, but remember to clean throughly everything once you've taken the assembly apart.