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#88517 10/18/2004 2:02 PM | Joined: Jan 2002 Posts: 175 Member | | Member Joined: Jan 2002 Posts: 175 | I am in the process of installing a new YnZ wiring harness in my 49 1/2 ton. I didn't make very good notes when I took the old harness out or pictures of the way the switch was installed. I can find no markings on the terminals indicating which is which. Anybody out there who can enlighten me? Thanks | | |
#88518 10/19/2004 5:49 AM | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | According to my reprint copy of the service manual only 2 terminals are used on the 49 switch.
Use an ohm meter to determine which 2 have continuity when the key is on and lose it when the key is off. It won't matter which side of the switch is hot. It just goes in and out. | | |
#88519 10/19/2004 3:12 PM | Joined: Oct 2002 Posts: 4,066 Bolter | | Bolter Joined: Oct 2002 Posts: 4,066 | very interesting 
Redryder pixMy HotrodA veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of "up to and including my life."I am fighting cancer and I am winning the fight | Pain is part of life; misery is an option. | | |
#88520 10/20/2004 12:16 AM | Joined: Jul 2003 Posts: 141 Member | | Member Joined: Jul 2003 Posts: 141 | I installed a NOS ignition switch in my 52 1/2 ton about 2 weeks ago. It was not marked either, so I just tested all 3 terminals with my VOM. With the key in the off position all three terminals are insulated or open. With the key in the on postion all 3 terminals are closed or conducting. Pick any terminal for the BAT connection, then the other 2 will get voltage when you turn the key. I finished all my wiring last weekend and it works great.
shoeless | | |
#88521 10/20/2004 1:58 PM | Joined: Jan 2002 Posts: 175 Member | | Member Joined: Jan 2002 Posts: 175 | Thanks for the info guys. I'll be working on it this weekend. | | |
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