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Ha ! im too late to chime in.. but yes thats the lock light for the NP203 and they are very hard to come by. I picked up a burned out one and surgically replaced the bulb, so now I have an extra..... and its a cool novelty, may end up somehow putting in my shop to light up for show......
Ha ! im too late to chime in.. but yes thats the lock light for the NP203 and they are very hard to come by. I picked up a burned out one and surgically replaced the bulb, so now I have an extra..... and its a cool novelty, may end up somehow putting in my shop to light up for show......
I may have to pick your brain on how you surgically put in a new bulb. LOL I'll fiddle fart around with it first to see if something got disconnected.. much cooler when it works. Yeah I couldn't find any replacements some were sold for 75 bucks or more..
No prob Hawkeye, i will go look at it in the morning and get a fresh look of what I did to put in a new bulb... I remember most of it, but dont wanna give ya bogus info..
[QUOTE=Coltin1992;16235253]I would like to get my 4x4 Indicator light working again as it has been disconnected since I bought the truck. I have a 1975 F-250 with a NP205 transfer case part time 4x4. I've tried doing some digging on this but there's just not a whole lot out there. So few questions below.
1. Does anyone know where I can buy the right indicator switch, and where it goes on the transfer case? (pic of connector and light below)
2. Is there a wiring schematic for this particular circuit? There's 2 wires going into the light in the cab and one wire on the connector.
3. Do any of your trucks have this? If so would you mind snapping a picture of the light on and connection points on the transfer case. And explain how it works?
I was going to leave this not working but it'll bug me to much once my truck is put back together! Thanks for the help. Nothing this forum hasn't answered yet. Appreciate it!
[/QUOTE
Sorry for asking on an old post. I was curious if you ever figured out how to hook up the wiring for the light and connection on the transfer case. I have the same issue and I rewired the truck but the wiring harness I used has no wire for that particular part of the truck. Curious what you did and any help would be greatly appreciated!
Do you have a 203 or a 205 transfer case?
Do you already have the light mounted to the dash and are just looking how to connect it to the transfer case?
Thanks for responding! I'm pretty sure it's the 203 transfer case and the truck had the "lock" light mounted under the dash and there was a single wire hooked to the transfer case when I got the truck but no fitting under the dash to plug into the light. Since then I replaced all the wiring in the truck and the new harness did not come with a wire for that light. I was wondering how to run a new wire to make it all work. I'm confused with the single wire going to the transfer case. I would think with a switch in the transfer case you would need a hot feed and a return wire to the light under the dash.... maybe it's done differently and I don't know about it. Thanks!
One wire sounds correct.
The pictures above show the single blue wire with a push-on connector for a switch mounted in the transfer case.
Usually a single wire would indicate that the switch simply switches the ground side of the circuit. Confirmed by Mike’s wiring diagram above.
So the switch inside the transfer case simply grounds to the transfer case. The +12 V is always at the lamp itself from a black wire with green stripe.
Black with green should indicate the lamp is powered up anytime the ignition switch is in either the ON or the ACC positions.
Ok, so when I wire it up, do I feed one side of the 2 prong light with an ignition on feed and also run that same wire to the transfer case and the other prong just ground? Thanks!
No.
One wire on the lamp is 12v+ and the other is ground (12v-). The switch at the gearbox grounds it, turning the light on.
You wire one of the lamp's terminals to 12v positive, the other terminal to the switch.
I don't know if it matters which one, so take a look closely for any indications, or post up a close-up shot of the connector area.
When the t-case is shifted into a Lock position, the switch grounds through the box and the power circuit is complete allowing current to pass through the bulb.
If you wire the 12v positive directly to the switch on the gearbox then as soon as you shift it into position either the fuse will blow (if there is one), or the wire will melt. There always must be a load (resistance) between the positive and the negative or you get (literally) a short circuit.
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