Where can I get a wiring diagram for a 1997 Dodge RAM 3500 diesel pickup?

It isn't specified. There is more than one fuse that covers transmission. You would need an auto electrician or a transmission expert to connect a pro grade scan tool computer and diagnose if the switch or solenoid is faulty. A scan tool at this level is bi-directional and can command solenoids to operate and confirm that they do.

https://www.google.com/search?q=auto+electrician+near+me

Fuse Box Diagram Dodge Ram 1500/2500 (2002-2009)

https://fuse-box.info > dodge > dodge-ram-1500-2500-...

Fuse box diagram (location and assignment of electrical fuses) for Dodge Ram / Ram Pickup 1500/2500 (2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009).

2006-2009 Dodge Ram 1500/2500/3500 Fuse Box Diagram

https://knigaproavto.ru > ... > Dodge > Ram (Pickup)

Nov 16, 2018 - 2006-2009 Dodge Ram 1500/2500/3500 Fuse Box Diagram ; 5, 20, except Base: Sunroof ; 6, 40, Diesel ('06): Wastegate Solenoid, Drive Fan Radiator ; 6 ...

2006 5.7 ram 1500 fuse box diagram - DodgeForum.com

https://dodgeforum.com > ... > 3rd Gen Ram Tech

3rd Gen Ram Tech - 2006 5.7 ram 1500 fuse box diagram - I was hoping somebody had a fusebox diagram kicking around. The inside of my fuse box cover does not ...

Fuses and relay Dodge Ram 2002-2008

https://fusesdiagram.com > Dodge

Mar 27, 2017 - For Dodge Ram 1500, Dodge Ram 2500, Dodge Ram 3500 - 2002, 2003, 2004, 2005, 2006, 2007, 2008 model year. Cigarette lighter fuse - Fuse box in ..

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Here you go, Fuse 13.

Dodge Ram 1500 / 2500 / 3500 (1994-2001) fuses ...

https://fuse-box.info > dodge > dodge-ram-1500-2500-...

Fuse box diagrams (location and assignment of electrical fuses and relays) Dodge Ram Pickup 1500/2500/3500 (1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001)

1994-2001 Dodge Ram 1500/2500/3500 Fuse Box Diagram

https://knigaproavto.ru > ... > Dodge > Ram (Pickup)

Nov 18, 2018 - Fuse Box Layout Dodge Ram 1500, 2500 and 3500 - 3.9L, 5.2L, 5.9L and 8.0L (Regular Cab, ... 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001)

Fuse box diagram Dodge Ram 1998-2001

https://fusesdiagram.com > Dodge

Jan 13, 2021 - Fuse and relay location. Fuse box diagram. Cigarette lighter fuse. Assignment of the fuses and relay Dodge Ram 1998-2001.

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Possible turn signal switch. The headlight switch is incorporated with it.

Check the headlight switch. The power goes from the fuse to the headlight switch and then to the dash and running lights.

there could be a 5 volt reg on the main circuit, tracethe wire back using a probe.

Very likely stuck door jamb switch. Replacements are cheap and available at most parts stores.

I'm sending your wiring diagram for your 1999 Dodge Ram 3500 it's a complete anti-lock brake circuit that includes a stop light switch.

i fixed it myself .thanks

Here's a link to a pdf file containing the headlight wiring diagram for your year model Dodge Ram 1500..
I can't help but notice that you say you've replaced the headlight relay? That's quite odd, because there is NO headlight relay on this vehicle- only a 40 amp fuse located in the power distribution box that sits behind the battery inside the engine bay.
The switch is notorious for burning out because there is NO RELAY on this vehicle, and there is a recall (#819) but this only affects 3500 models even though the headlight wiring is the same for 1500,2500 and 3500 model Rams.
Here are two more links that will help you troubleshoot your headlights problems.
HereInformation on Putting a Relay in the Wiring System