Why no signal to the starter from switch position number three

Tiny
1993 JAG ROGER
  • MEMBER
  • 1993 JAGUAR XJ6
  • 4.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Car has been parked in climate controlled (temperature and humidity) garage for fourteen years. The battery was drained flat and has been replaced with a new battery. Plugs have been removed and upper combustion chamber fogged several times with fogging oil. PCV tube has been removed and valve train fogged several times with fogging oil. Starter was new when I parked car fourteen years ago. No animal contact with any electrical system components or wiring in the fourteen years. I have drained the fuel tank but have not refilled it because I have not replaced the fuel filter yet. No electrical connections to the fuel tank or fuel pump have been removed. I have tried to reset the radio with the four digit security code but it does not work. All interior lights do work. Now, when I insert the ignition key with the drivers door open I get the expected audible beep. I then close the door and turn the ignition key to position two and I do not get any response from the instrument panel. I turn the key to position three and I hear one click like a relay latching but nothing else and nothing else happens. The transmission shifting lever is in the "park" position and will not move to any other position. It was fully operable when parked. There is the original security system on the vehicle and there are no "key/security "fobs, only the ignition key which operates the door. What devices or modules are in the starter motor solenoid activation logic? I do not have any of the control diagrams, but it would seem to me that only the inertia switch, ignition switch, transmission neutral switch, body processor module and starter relay (and maybe the fuel pump relay) would be all that are required to make the starter engage.
Thursday, August 3rd, 2017 AT 9:46 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
Fourteen years is a long time for a car to set. I would start by cleaning and testing all the wiring to the battery, then go through the fuse box and pull and reinstall the fuses and relays. Corrosion loves to form on connections. You say you have no power at the dash, that means you probably have no power to the BCM as well. Re-seating the connections and fuses may fix that. I would also put a wrench on the engine and verify that it will turn over at least two full revolutions. Fogging oil is good but it should be done when the engine is first stored and then at least once every other year while it sets. If you just did it now after it has been setting you may still encounter a stuck valve or two. Turning it by hand can show you that before trying to start it.
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Thursday, August 3rd, 2017 AT 11:47 AM

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