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Hi. I have a 99 crown Vic. 100,000 miles. Car was running and starting fine all day. Suddenly would not start. Engine will not crank. So I checked all fuses (not relays). Found 2 blown fuses. One in the cab (backup lamps) and one under hood (high speed cooling fan). I replaced both. Battery has plenty of juice. Battery terminals are clean and brand new. All lights come on. I have plenty of fuel pressure as well. But engine, or starter for that matter, will not crank. I do hear TWO clicks coming from relay box on driver side. I’m wondering if my starter has crapped out or if I have blown relay(s). This baffles me as car has ran fine all day. First time this has happened.— P.s.- certified mechanic told me my ac compressor is beginning to go out (even though I still had defrost and cold ac before THIS happened)
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I have never seen this make of auto, but here is some general trouble tips that apply to most makes
Did you check the switching voltage on the starter motor,
There a large should be a large thick cable, this would have 12V on it all the times,
There is a smaller cable, the 12V would appear here when only when you crank the engine
A quick test to test the starter is to connect the larger cable to the smaller cable for a brief period, this would simulate the switched 12V
Whilst doing this make sure the hand brake is on firmly and the car is out of gear
If the switched 12V is not there whilst cranking, possible causes are park/neutral switch,
relay, ign switch, wiring.
If the switched 12V is present whilst cranking I would have a look at my starter motorYour vehicle has a security system built into it called the PATS function. It uses the PCM to enable or disable the engine. All elements of PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start. PATS uses a visual theft indicator located on top of the instrument panel. This indicator will prove out for three seconds when the ignition switch is turned to ON or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily (for more than three seconds) when the ignition switch is turned to ON or START. PATS also “flashes” the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.
Quick check to see if you have voltage to the starter with ignition in start position…. There is a single, black wire that goes to your starter. It attaches at the starter with a spade connector; if it has 12 Volts with ignition in start position your PATS is functioning. Slide the connector off/on several times and see if starter cranks….If not check starter
Another issue I remember on the Crown Vic’s is… #2 fuse in the underhood fuse box open —wiring harnesses was rubbing on the wiper motor mounting bracket
If you have a PATS issue, I think there is an on board diagnosis procedure…no scan tool required…I‘ll have to check some old Ford school books.
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