My 2006 business class freightliner just clicks when i hit the ignition switch
We changed the solenoid on the fire wall as well as the solenoid on the starter and still just get a click when we turn the ignition switch to start. Checked fuses on fender well,but found nothing wrong. Any suggestions would be appreciated. We have brought truck to be checked out, but sometimes it will just work every time. Tough one to trouble shoot. Thanks in advance, Burns
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There is a safety switch on top of the brake pedal lever or clutch lever which is suppose to prevent lurching on start-ups. It is suppose to insure that the Brake pedal is pushed OR the clutch is down before the engine will crank.
The Ignition switch is interrupted by the above cutout switches. But when Ignition is turned on, the Glow plug timer should click and cycle if Power Relay is giving it juice. So if you do not hear that type of clicking, the glow plugs will stay cold.
I would check to see if power is going to the Power Relay above the glow plug timer, and if it is getting power, does the Power Relay send it to the Timer? The starting circuit is more involved in a Diesel because the fuel must be atomized by heating it for initial starts. But you must be getting this process if jumping the solenoid results in the engine starting.
Therefore the big test is whether the small wire to the starter solenoid is dead when a foot is pressing the Brake or clutch pedal when the Ignition key is in the STARTER position.
So either your Ignition switch is bad at the STARTER terminal position or the signal is interrupted by the anti-lurch Interlock switch. It is quite common for problems with this switch being hit and broken or displaced by the Drivers' feet.
There was also no indication of whether you jumped the solenoid on a warm engine which could atomize the fuel by compression or a very cold engine which needed the glow plugs to work.
Please comment on my info and report your success.
Alternator just charges your battery and wont have any direct link to a starter problem. It is very important that starter wires be very snug when replacing the starter. especially the big wires. However it is the little wire that activates the main relay. I don't remember if this car has a remote solenoid or not. If it has a remote solenoid then the main positive wire from the battery will go to the solenoid mounted on the fire wall or fender and then one big wire will go down to the starter. The start solenoid will have the battery wires hooked to it but also a little wire from the ignition switch. If you dont hear a click then either the ignition switch is bad or the solenoid is bad. Or perhaps the contact from the ignition at the solenoid is bad.
if it turns over from below,then its in the ignition switch and this also feeds power to the e.c.m. to make the engine fire so you either have a bad switch contact or the hot 12 volt wire to the ignition switch