Paul372 Posted February 26, 2023 Share Posted February 26, 2023 Having problem starting supra tt auto it won’t turn over or crank seems like it’s dead but it has power, battery is good all lights etc working, also tired jump leads no joy. It’s currently under cover so thought I would air it and start it up, I did this about month ago with no problem started first time now seems dead not even any clicking, any ideas what could be the cause thanks Quote Link to comment Share on other sites More sharing options...
Paul372 Posted February 26, 2023 Author Share Posted February 26, 2023 (edited) I’m thinking possibly starter relay has there’s no clicking at all, how can I test this. I’ve also tried starting up in N and D but it’s the same nothing Edited February 26, 2023 by Paul372 (see edit history) Quote Link to comment Share on other sites More sharing options...
Annabella Posted February 26, 2023 Share Posted February 26, 2023 Is the battery new? Even though the voltage can show good, the ampage can be too far gone if allowed to go flat. Also a rusty ground connector. Quote Link to comment Share on other sites More sharing options...
tayr Posted February 26, 2023 Share Posted February 26, 2023 Give the starter motor a tap with a long pole and hammer while trying to turnover. Quote Link to comment Share on other sites More sharing options...
Paul372 Posted February 26, 2023 Author Share Posted February 26, 2023 No the battery not new but it has held its charge as I’ve had it disconnected while the supra undercover Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 26, 2023 Share Posted February 26, 2023 Push the gearstick forwards and try it, maybe the neutral start switch is a bit dicky Quote Link to comment Share on other sites More sharing options...
mattdavies Posted February 27, 2023 Share Posted February 27, 2023 Have you checked the fuses ? I cant remember if the 120AMP fuse cuts all power or just the big power stuff Quote Link to comment Share on other sites More sharing options...
Paul372 Posted February 27, 2023 Author Share Posted February 27, 2023 Fuse might makes sense why everything else still working and powers up, I will have to play around with the weekend and let you know how I get on. Quote Link to comment Share on other sites More sharing options...
jagman Posted February 28, 2023 Share Posted February 28, 2023 you can check at the starter relay - one contact is voltage via 7.5 fuse - ignition switch , neutral switch to the contact , the next contact on the relay is voltage from large supply fuse to relay , this is the voltage supplied to the starter , you should feel the relay click , if clicking - then its likely the starter motor itself and it requires battering with a hammer in the first instance - then removing stripping cleaning fixing or a replacement - simple voltmeter tests needed Quote Link to comment Share on other sites More sharing options...
Paul372 Posted March 12, 2023 Author Share Posted March 12, 2023 I’ve replaced the battery and starter relay/fuse still the same, I have power and lights but won’t crank its dead. Any ideas on what fuses to check Quote Link to comment Share on other sites More sharing options...
Paul372 Posted March 12, 2023 Author Share Posted March 12, 2023 Given the starter motor a few hits, brake lights are working so can’t be brake switch, rocked the supra back and forth, tried starting it up in neutral, moved the gear lever back and forth still nothing. Is there a safety switch on the auto gearbox that could stop it from cranking Quote Link to comment Share on other sites More sharing options...
Style Posted March 13, 2023 Share Posted March 13, 2023 Is there an aftermarket alarm/immobiliser installed on the car? Could be that going haywire Quote Link to comment Share on other sites More sharing options...
jagman Posted March 18, 2023 Share Posted March 18, 2023 You check at your starter relay - use a voltmeter and measure - 1 pin has the voltage from fuse7.5 amp via ignition switch via neutral switch and via immobiliser if fitted - 12 volts when you turn the key = all good . the next pin on the starter relay mount has supply to the starter motor to signal it to crank - measure here for 12 volts ,all good then the problem is at the starter itself - the heavy duty lead to power it or its lost its earth -via the block itself - or the 12v crank supply - all good ? then your starter needs replacing - take it off and try it on the bench with a battery where you can see it engage and turn - hold on to it !!!! If you dont get 12v from switching the ignition switch - here is your problem - no neutral switch or fuse or ignition switch or immobiliser - so you check at the neutral switch on the gear lever side of the gearbox with a voltmeter or check the fuse is ok or the ignition switch is actually switching (they do fail) Quote Link to comment Share on other sites More sharing options...
Paul372 Posted April 28, 2023 Author Share Posted April 28, 2023 All sorted, turned out to be the inhibitor switch on the gearbox needed adjustment 1 Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 29, 2023 Share Posted April 29, 2023 Said this lol, congrats 1 Quote Link to comment Share on other sites More sharing options...
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