To determine the #1 cylinder location on the distributor cap, you need to know that the firing order is based on the engine's crankshaft rotation. The #1 cylinder is typically located on the passenger side (right side) of the engine towards the front.
Finding #1 on the cap:
There isn't a universal "always this way" for the #1 cylinder location on the distributor cap. The wiring is rotated based on the specific distributor model installed. You MUST use a reliable diagram specific to your engine and distributor. Your best bet is:
1. Your owner's manual: This is the best source. It should have a diagram showing the distributor cap wiring.
2. A repair manual for your specific year, make, and model: Haynes, Chilton, and factory service manuals are good sources for detailed wiring diagrams.
3. Online resources: Websites like AllDataDIY (subscription required), or dedicated automotive forums specializing in Dodge Rams might have diagrams. Be cautious when using online diagrams; ensure they are for your exact engine and year.
Without a specific diagram for your distributor, it's impossible to definitively say where #1 is located on the cap. Attempting to determine it without a proper diagram could lead to improper firing order and engine damage.