hi, quick question.. any wire in the engine bay considered accessory power. something that is keyed on and will stay on during start.... thanks
Not really, there is no "accessory" power in the engine bay at all. If you want to make one, all you need to do is hook up a relay with the coil connected to the I on your starter relay, and run power straight from the battery through the relay. For most 12V automotive use relays: Code: Battery | | 87 Relay85----I on starter relay 89 | | Accessory The contact numbers are from memory, and since I'm a functional dyslexic, probably not in the correct order. Also, don't forget to at least use an inline fuse.
Temperature Activated Vacuum (TAV) System 1973 Mavericks and Comets using the 250 six-cylinder engine and automatic transmission built before March 15, 1973 are equipped with a Temperature Activated Vacuum (TAV) system to control distributor spark advance. The system contains a 3-way solenoid valve, an ambient temperature switch located in the front door hinge pillar, a vacuum bleed line to the carburetor airhorn and a spark delay valve. When the ambient temperature is above 60°F, the contacts in the temperature sensor close and complete the circuit to the 3-way solenoid. This energizes the solenoid and connects the EGR vacuum port on the carburetor to the distributor vacuum advance. The EGR vacuum signal is weaker than the normal spark port vacuum signal, thus supplying less vacuum advance once the outside temperature rises above 60°F. When the ambient temperature is below 49°F, the solenoid is de-energized and the distributor vacuum advance operates in the normal manner, thus aiding cold weather drivability. Cold Temperature Activated Vacuum (CTAV) System 1973 Mavericks and Comets using the 250 six-cylinder engine and automatic transmission built on or after March 15, 1973, as well as all 1974-77 models using the 250 six and automatic transmission are equipped with a Cold Temperature Activated Vacuum (CTAV) system to control distributor spark advance. This system is basically a refinement of the TAV system with the temperature switch relocated in the air cleaner and a latching relay added to maintain a strong vacuum signal at the distributor, whether it be EGR port or spark port carburetor vacuum, and to keep the system from intermittently switching vacuum signals when the intake air is between 49 and 60°F. When the temperature switch closes at 60°F, the latching relay (normally off) is energized and stays on until the ignition switch is turned off. The latching relay then overrides the temperature switch and forces the solenoid valve to keep the spark port vacuum system closed and open the EGR port vacuum system. This prevents full vacuum advance, once the engine is warmed-up, thereby lowering emissions.
Those are year and engine specific. Also, I wouldn't use that for anything other than pulling a relay anyway.
Yes it is but has the coil drop resistor feeding it, still it will provide plenty of current for operating a relay that can be fed from power at solenoid... Don't use it if you're still running points... AFAIK it's the only wire that will be there on all model years, or at least prior to Duraspark...
