Their are different configuratioins to timing lights, but they are more straight forward than they seem at firsat glance.

Usually your timing light will have 3 wires coming off it.

Pos and neg (red and black) go to the batt terminals.

The third clip goes on the spak plug wire from the #1 cylinder to the distributor cap.

Jumper the check T and E1 spots on your check connectors (on 85/86 and earlier it is a round plug on the driver side of the engine compartment that just plugs into a rubber cap, on 87 or later it is a rectangular box (1.25 by 1 by .75 in?) next to the main fuse box on the passenger side of the engine compartment).

start the engine (make sure no timing light wires dangle into your fan!!!).

aim the timing light at the crank pulley to see where th notch comes up.

rotate the distrib slightly to either advance your spark in relation to the crank or to ease off of it. you mentioned a tps earlier so i guess you have an efi engine? probably your timing mark should be about at the 5 mark on the little numbered lobe hanging over the crrank pulley.

key things: watch your fingers around all those moving parts and read your Haynes/CHilton manual carefully.

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