Hi, i have a 55 plate zafira b 1.6 petrol manual car. I recently started experiencing starting problems where car would turn and start when cold but not turn when hot. I assumed that the starter was playing up ie jamming when hot. I checked my battery and that returned over 12.6v, I changed the starter motor but no good. The dash lights come on but there is no click of the starter solenoid. I can start the car with a push start. I checked the starter conections and i have 12.7v at the starter live, the starter casing is earthed. I then checked if i had a voltage on the switch connection of the starter when the key was turned- no voltage. I then checked the 25amp fuse in the box this is ok. A continuity check proved the starter wire back to the connector block outside the fuse box. I have continuity between the external connector block and a pin connector for the fuse. When turning the key i hear a relay clicking so assume that the key barrel is ok. There is no voltage pushing current down to the starter. I can only assume i have an issue between the relay and the external connector block? I have changed the battery in the keyfob as a precaution since it has not been done for years. So would apreciate help, i am available to ans questions
Ps have tested both starters on the bench and are ok
im getting a kittle bit exasperated with this. I have gone through various checks again also i have followed your suggestions all not successful.
1 rechecked both starters on the bench with 12v battery, bot working ok
2 checked continuity and resistance on power line from battery to starter live, 12.7v, continuitybok, low ohms.
3 switch live to starter solenoid continuity ok and low resistance.
4 earth strap to body good, no corrosion, continuity ok, low ohms.
5 new battery, no difference, jump lead start, no difference.
6 key operation causes relay in fuse bix to click, no start, substituted 2 other realys, no difference.
7 fuse tested ok.
i have continuity on switch line from starter back to connector block outside fuse box, also continuity from this block into fuse box to fuse terminal.
It seems as though the relay switches on but there is no current flow to the starter.
All the dash lights come on, also i have prev push started the car.
just to let u know, i was not able to sort the problem and had to call in a mobile auto tech. He spent around an hour and 45mins working through various things. Initially his diagnostic dubry showed a mass of error messages and fault codes, prob from all my messing around, he managed to get rid of most, eventually found a comuncation problem between the management system and the ignition system, he sorted this then cleared a few other faults for me. Car running and ok at moment.
thanks fo your help will keep your details for future use.