My Cooper 05 standard doesn't always start, it has a new starter, and still doesn't always start..I'm wondering if the safety switch on clutch is making full contact..? It has been in storage all winter, I figured I WOULD work on problem this spring, it seems to be starting more now then not, makes no sense to me reasons?

SOURCE: wont start

There's only 2 more things that I can think of, check the fuse for the ignition, then the computor itself, you did everything else.It might be the problem and may not.

SOURCE: 2004 ford ranger wont start battery good starter

yes the clutch safty switch completes starter circuit to test just jump switch with a paperclip if truck starts switch is bad

SOURCE: ocasionally engine (2004 malibu classic)wont turn

have you checked or replaced the starter relay?

Ned White

• 2100 Answers
• Posted on Jun 10, 2010

SOURCE: 2001 isuzu rodeo doesnt always start. new

Dirty terminals, happens all the time. Did you have the battery tested? Or just know it's OK? Did you check the water? How about the electrolytes? Get the terminals cleaned off with a wire brush, and scrape the insides, make sure they are tight. I have replaced more batteries this week, must be the weather. One was stone dead, 5 volts and still started the car?? Couldn't believe it, good car. The other 2 were dead with 12+ volts but wouldn't start anything, both got new terminals, and both got cleaned up. NO problems. Check it out. Lastly, the solenoid in the starter could be bad if everything else checks out, whack it with a hammer while turning the key, if it jumps, you found it.

SOURCE: have a ford f 350

Did you check for power at the starter ignition terminal? It is the small YELLOW/BLACK wire on the starter. If there is power there, replace the starter. If there is no power there, you should check your starter relay an its associated fuses.
The relay primary side is protected by fuse number F2.31 (15 Amp) in the Central Junction Box. This fuse provides power to the clutch safety switch on the WHITE/PINK wire. Then the power leaves the clutch safety switch on the TAN/RED wire and goes to pin 86 on the relay.

The relay secondary side is protected by fuse number F2.113 (30 Amp) in the Central Junction Box. It provides power at pin 30 on the relay, which is also located in the Central Junction Box.

Pin 87 at the relay is the YELLOW/BLACK wire metioned earlier and goes to the starter motor.
Pin 85 at the relay is the primary GROUND. This should be ground at all times.

The ENTIRE starting system can be checked/diagnosed from the pins at the starter relay if you use the correct methods and equipment.