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- 2,242
- 113
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- Wenatchee, WA
It looks like oshkosh equipment lists this bulb as 6 volt and others don't mention a voltage. Needless to say the 2.5 volt bulb that came with my truck was fried. What is the correct voltage? 24v?
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bulb voltage for M813 pre-heater/glow plug indicator
- Thread starter US6x4
- Start date
162tcat
Active member
- 710
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- Washington
A 24 volt bulb will work no matter what, just may be dim. Check the TM for part number or nsn
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Sent from my iPhone using Tapatalk
- 2,811
- 41
- 38
- Location
- Mt. Eden, KY
The stock intake heater on the 813 is 12 volts .hence the power lead in on one battery. - the bulb is 12 volts also.
- 1,233
- 2,242
- 113
- Location
- Wenatchee, WA
It looks like the NSN # is 6240-00-012-5588
- 1,233
- 2,242
- 113
- Location
- Wenatchee, WA
The NSN posted above correlates to a size 55 miniature automotive bulb which is rated for 7 volts. I put a multi-meter in the socket and got steady readings between 6.7-7.1 volts.
This bulb socket had power to it regardless of the battery ON/OFF switch position so you wouldn't want to leave the pre-heater switch on.
This bulb socket had power to it regardless of the battery ON/OFF switch position so you wouldn't want to leave the pre-heater switch on.