22 guage
The tach should have 3 wires a 12v accessory, ground, and rpm wire. The rpm wire is the blue one on the distributor.
The wire should rest at 12V+ or zero but when the parking brake is on the wire goes 12V- .
yes a 12v constant is a wire that has 12 volts even with the ignition off, you should not have to run a new wire the existing stereo should have one for station memory. with the ignition off test all wires on the stereo connector, only one should have power.
Yes.
Memory (+12v Constant)Yellow should have power with the key offIgnition (+12v Switched)Red should only have power with key on
take a 12v power cord splice the wire and reconnect
what is meant by "car audio"? an amplifier will not turn on if it is missing either ground, 12v or 12v accessory turn on. the respective wire colors will be large red wire for 12v battery source, large black wire for -12v ground battery or chassis, thin blue wire for accessory 12v turn on. these wires can be tested for 12v with a multi-meter or a simple test light. a car radio is basically the same wire design for power up, most radios will need 12v to the yellow wire, accessory 12v for the red wire and chassis ground for the black. test these wires the same way the amplifier is tested and repair any wires not functioning correctly. if this does not help, respond with more detailed accurate assessments of problem for further advise.
The gauge of wire that is 12 volt is 18, 14, and 16.
12v switched source. such as headlight switch or dimmer on the dash.
Red to positive, black to negative
Sounds like the computer isn't getting the needed 12v power when the vehicle is turned off. Check fuses and wires, Verify that you get 12v on the power wire, not the ignition wire. The Ignition wire only works when the ignition is activated. The 12v power wire provides power for the simple data, as in date and time, and saves that you have put in.
you take the socket and plug the flasher into it