FILE 04-A REV 2026.04 DRAFT
FRAME · 04-A / PICKUP
04-A Section · Pickup
PICKUP.LIGHT-DUTY.
The most common train horn install — and the most common place people get it wrong. A 12V pickup makes 30–50 A at idle and 60–110 A at cruise. The 46 A peak draw of a Viair 444C sits right at the edge. Right kit, right wiring, right tank for the truck you actually drive.
In the build queue
/01 PENDING
Mounting locations
Frame rail / under-bed / fender well / behind grille — pros and cons each.
/02 PENDING
Alternator headroom
70–130 A factory alternators vs the 30–46 A peak draw of common kits.
/03 PENDING
Fuse-box wiring
Aux fuse-tap procedures by truck-make. Steering-wheel button vs dash switch.
/04 PENDING
Tank vs tankless choice
Pickup-bed real estate vs cab integration. 1.5 gal vs 5 gal trade-offs.