Wiring diagram for Weldex WDRV 3057 - Cars & Trucks

https://www.rvcams.com/p/WDRV-3007M-KIT.html
The trailer is equipped with the camera. Does your vehicle have the rest of the system?

Normally, it means either the front or the rear bulb is burned out. If front and rear bulbs are good, and that means both lamp filaments in both bulbs are good. It could be the flasher, a bad ground, a bad bulb socket, or the turn signal switch.

The part # for your 1997 grand cherokee front turn signal bulb not the side is 3057, good day

It all depent's which ones are out, here a list of rear bulb's.

Turn signal bulbs # 921
Stoplight's # 3057
Tail light's # 3057
Backup light's # 921
Center stop light # 921
License plate light # 17177
Side marker # 194

Have some one turn light on while some one check them. First light then brakes then turn signals. till you see which ones don't work, and replace as needed.

No there not connected, replace the brake light
1999 Chevrolet Blazer Auto Light Bulb Size Guide
Low Beam Headlight Bulb Size: 9006
High Beam Headlamp Light Bulb Size: 9005
Parking Light Bulb Size: 3157
Front Turn Signal Light Bulb Size: 3157
Rear Turn Signal Light Bulb Size: 3057
Tail Light Bulb Size: 3057
Stop Light Bulb Size: 3057
High Mount Stop Light Bulb Size: Assembly
Fog/Driving Light Bulb Size: 880 or 881
License Plate Light Bulb Size: 194
Back Up Light Bulb Size: 3156
Front Sidemarker Light Bulb Size: 194
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 or 211-2
Step/Courtesy Light Bulb Size: 168 or 211-2
Trunk/Cargo Area Light Bulb Size: 211-2
Under Hood Light Bulb Size: 93
Instrument-General Light Bulb Size: 161 or 37 or PC194 or PC74
Check Engine Indicator Light Bulb Size: PC74
Hi-Beam Indicator Light Bulb Size: PC74
Seat Belt Indicator Light Bulb Size: PC194
Brake Warning Light Bulb Size: PC74
Automatic Transmission Indicator Light Bulb Size: 194
Directional Signal Indicator Light Bulb Size: PC74
As for the horn, inspect the fuse and relay and most common it would be a bad ground wire or worst a bad horn due to corrosion. Horn will be located in the drivers side fender.
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Fog/Driving Light Bulb Size: 880
Here is the rest of the bulb size used in your Montana.
2000 Pontiac Montana Auto Light Bulb Diagram
Low Beam Headlight Bulb Size: 9004
High Beam Headlamp Light Bulb Size: 9004
Parking Light Bulb Size: 4157NALL
Front Turn Signal Light Bulb Size: 4157NALL
Rear Turn Signal Light Bulb Size: 3156
Tail Light Bulb Size: 3057
Stop Light Bulb Size: 3057
High Mount Stop Light Bulb Size: Assembly
Fog/Driving Light Bulb Size: 880
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 3156
Front Sidemarker Light Bulb Size: 194
Ash Tray Light Bulb Size: 558
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168
Dome Light Bulb Size: 562
Step/Courtesy Light Bulb Size: 168
Trunk/Cargo Area Light Bulb Size: 212-2
Daytime Running Light Bulb Size: 3157NALL
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2005 CHEVROLET Malibu
Low beam headlamp
H11

High beam headlamp
H9

Parking light
3157

Front turn signal
3157

Rear turn signal
3057

Tail light
3057

Stop light
3057

High mount stop light
912

Fog/Driving light
880

License plate
194

Back up light
921

Front sidemarker
24

Rear sidemarker
194

Ash tray
161

Glove box
194

Map light
168

Dome light
561

Step/Courtesy light
168
37

Trunk/Cargo area
211-2
http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm You can find all auto bulb info here.As far as the fuse there should be a fuse diagrahm on the back of the access door.Well hope this helps.

3157

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They will work but 3057 is a weaker illumination.