Non Starting.

Hi Nigel,
for testing the power source at pin 24 you should disconnect the ECU-plug and then install a bulb (I think a headlight-bulb will be good) between pin 24 and 11 (ground). If you don't measure about 12 Volts with ignition on, there is definitely a problem with the cable connection. The relais powers both '16' and '24', therefor it must be the cable 24.

Regards
Norbert

Hi Norbert ,Thank you for that ,Just to be clear,a would a normal test light which I have one end connected to pin 24 and the other to pin 11,this and together with exactly the same ( together with the pins of a volt meter and test light together ) for the test ? Plug removed fron the ECU. .Today I retried my spare ECU and I was surprised to hear the pump hum as it should also the pump relay was clicking,I tried to start the engine cranked for maybe 10 seconds before I realised I'd forgotten to replace the coil HT when I tried again the hum from the pump and the relay stopped clicking..Regards Nigel.Regards Nigel.

No, Nigel -
you need a ballast. The test light's current is too low.
The main light bulbs contacts have good conditions to apply a lead wire.

If you have a H4 bulb, use the middle and one of the side contacts.

Regards
Norbert

Thanks Norbert,Best Nigel.

Hi Norbert, While I'm waiting for a test light as you suggested  ,with the ignition on when I put my test light to pin 85 on thr pump relay ,the relay clicked and the pump made the normal humming sound..Does this tell you anything ? Thank you for your patience, Regards Nigel.

Hi Nigel,
the relay switches when you apply ground towards pin 85.
This is normally done by the ECU via line 19.

When you connect your test light, the 'ground' current through the light is sufficient to power the relays electromagnet.

Regards
Norbert