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Old 05-06-2009, 09:59 PM   #1
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HOWTO: bypass ignition switch

my tj wont turn over and i hear no clicking from the starter. i want to find out if its an ignition problem.

anyone know the best way to do this?

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Old 05-06-2009, 10:03 PM   #2
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have no clue on the by pass. how good is the battery? All connections to the starter good? Any blown fuses?

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Old 05-06-2009, 10:04 PM   #3
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screw driver between main battery lead on starter and ignition lead on solenoid.
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Old 05-06-2009, 10:06 PM   #4
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^ doesnt the ignition still have to be in the on position for this though
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Old 05-06-2009, 10:20 PM   #5
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-battery is reading 12.5 volts
-connections good
-fuses good


so i have someone hold the key in start position as i connect both leads?
if it starts dopes that mean my starter is in good condition and have to look closer to the ignition?
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Old 05-06-2009, 10:22 PM   #6
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Quote:
Originally Posted by Sb5551 View Post
^ doesnt the ignition still have to be in the on position for this though
no, its a hot lead from the battery. the jeep wont start unless the ignition is in the on position but it will rule out the starter. something like this happened to my dads grand cherokee a few weeks ago, i could turn the key and turn everything on but couldnt turn it far enough to engage the starter. turns out the ignition lock cylinder had a crack and a piece broken off of it making it so that i couldnt turn the key far enough. only took me like a half hour to change out the cylinder but for the week that the part was on order i had the ignition switch hanging out of the steering column so that i could manually engage the starter from behind the ignition switch.
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Old 05-06-2009, 10:23 PM   #7
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It doesnt need to be in the start positon just the on position. Then yes use a screwdriver to connect the two leads on the starter. Be careful not to touch the metal of the screwdriver or even wear insulted rubber gloves if you can. Youll feel it if you make a mistake.
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Old 05-06-2009, 10:23 PM   #8
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Quote:
Originally Posted by miltownTJ View Post
-battery is reading 12.5 volts
-connections good
-fuses good


so i have someone hold the key in start position as i connect both leads?
if it starts dopes that mean my starter is in good condition and have to look closer to the ignition?
no, not the start position, just the on position.
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Old 05-06-2009, 10:24 PM   #9
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Quote:
Originally Posted by 350chevrolet View Post
no, its a hot lead from the battery. the jeep wont start unless the ignition is in the on position but it will rule out the starter. something like this happened to my dads grand cherokee a few weeks ago, i could turn the key and turn everything on but couldnt turn it far enough to engage the starter. turns out the ignition lock cylinder had a crack and a piece broken off of it making it so that i couldnt turn the key far enough. only took me like a half hour to change out the cylinder but for the week that the part was on order i had the ignition switch hanging out of the steering column so that i could manually engage the starter from behind the ignition switch.
Makes sense. I didnt think of that.
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Old 05-06-2009, 10:26 PM   #10
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miltownTJ: what year is your jeep btw.
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Old 05-06-2009, 10:38 PM   #11
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1999 4.0 manual
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Old 05-06-2009, 11:14 PM   #12
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Clutch safety switch?
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Old 05-06-2009, 11:21 PM   #13
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i tried puting a 20A fuse in the #20 fusebox behind the glove compartment and nothing happened.

is there something in can check on the drivers side for the clutch safety switch?
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Old 05-06-2009, 11:27 PM   #14
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A quote from the FSM.

The Clutch Pedal Position Switch (CPPS) is located
under the instrument panel, attached to the clutch
master cylinder push rod. The wiring harness
connector is inside of the vehicle under the left
side of the instrument panel..

1) Disconnect 2-wire switch connector under
instrument panel.
(2) Check switch continuity with an ohmmeter
while operating clutch pedal.
˛ Pedal Depressed - Continuity
˛ Pedal Released - No Continuity
(3) If continuity is not present or always present,
replace clutch master cylinder. Switch is not serviced
separately.
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Old 05-07-2009, 02:12 PM   #15
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update: I manually got it running bypassing the starter relay and going straight to the battery. I found the problematic wire and traced it to my clutch pedal and brake pedal. I am going to test the continuity of the clutch cylinder but am hesitant to trust the results. If it shows no continuity the cylinder will need to be replaced or I just tested it wrong. Big risk on my part to replace a perfectly good cylinder. so my questions are:

what is a foolproof way of testing the clutch cylinder?
could my problem be associated with the brake pedal?
should i check further up the chain towards my ignition?

also i checked the clutch sensor override #20 fuse spot behind the glove compartment with a light testor and it did not light up
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Old 05-07-2009, 05:27 PM   #16
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Well, if it's the CCPS, you can bypass it. I haven't done it before, but I've seen a write up in this forum...
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Old 05-07-2009, 08:03 PM   #17
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its a 2 wire lead that only needs continuity. to bypass the clutch switch just connect the 2 wires that go into it to each other. simple. but you can now start your jeep in gear without pressing the clutch so be careful. iv had the clutch switch bypassed in my bmw 3 series for a few years now and have never had a problem. its actually fun being able to start it in first gear, makes for a real quick getaway lol.
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Old 05-08-2009, 01:07 AM   #18
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can you expand on the "just connnect the 2 wires that go into each other"?

i need a little more information
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Old 05-08-2009, 08:53 PM   #19
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the switch has a 2 wire lead going into it. for the engine to start there needs to be continuity between those 2 wires. pull the connector off and connect the 2 wires with a paper clip or some wire and try to start it. if it starts, personally i would just cut the connector off and solder the wires together and forget about the switch.

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