Ford Truck Technical Drawings and Schematics - Section H - Wiring - 1) the headlamp switches on all 1970 ford trucks (except "w" fashions) hire essential circuit breakers, one 12-amp for the headlight circuit and one 15-amp for auxiliary circuits. Connections to any point inside the circuits controlled by using the headlamp switch may be at the auxiliary circuit breaker, besides connections to the #12 circuit (headlamp hi-beam, green wire/black stripe), the #thirteen circuit (headlamp low-beam, purple wire/black stripe) and the #15 circuit (feed wire to the the dimmer transfer, purple twine/yellow stripe. Connections to the 12-thirteen or 15 circuits (headlamp bulb circuits) must be averted. The feed from introduced lighting fixtures to be managed via the headlamp transfer have to be terminated in a male bullet connector and be related to the girl bullet take-out (brown twine -- 285 circuit) at the left-hand side of the tool panel harness (close to the emergency brake). If the vehicle has roof marker lighting fixtures, this bullet might be occupied by using the feed from the roof wires. In this case fabricate a "y" jumper to permit both connections to the unmarried connector.
Please examine: most of the wiring diagrams published on this page are scans of unique ford diagrams, not aftermarket reproductions. These were scanned and published as very massive files, to preserve their readability. The 1969 diagrams and all others marked with a pink asterisk (*) were sent to via 1ec5f5ec77c51a968271b2ca9862907d from diverse assets, so their quality and/or size won't be as accurate or as detailed, however i nonetheless gratefully acknowledge folks that took the time to ahead them for posting. Subsequently all diagrams posted right here could be hi-decision for less difficult reading. Lighting fixtures controlled by means of stop lamp transfer and flip signal indicator f100 via f350 trucks are ready with a mechanical plunger stop lamp transfer that is mounted at the brake pedal arm. This transfer is designed for optimum loads generally less than the fuses or circuit breaker in the circuit, however adequate for ordinary stop lamp loads. The maximum load is 12.5 amps and in no way are masses in excess of this price permissible.
If the full load on both headlamp circuit breaker exceeds the breaker rating, the headlamps or taillamps will cycle on and rancid indicating the overload. If this happens, a part of the brought lighting have to be stressed thru a relay, feeding the relay coil from the headlamp transfer.