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[Datsun 1200 encyclopedia]

Coil Wiring

From Datsun 1200 Club

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Categories: Engine Electrical System | Distributor

Insert non-formatted text hereThe early 1200 coil -- as with nearly all pre-electronic ignition systems -- uses a Ballast resistor to drop the voltage supplied to the coil. All 1200s used a ballast resistor until the 1990 models.

Early 1200

NOTE: The 1973 Wiring Diagram doesn't show a resistor, but it definitely has one.

Stock wiring harness
24889.jpgAlbum 24889

Partwire colorConnects To
ballast resistor (single-terminal side)BWto IG terminal of ignition switch
ballast resistor (dual-terminal side)BW
to coil '+' terminal
to R (START) terminal of ignition switch\*
Coilwire colorConnects To
Coil '+'BWto ballast resistor dual-connector side
Coil '-'Bto distributor points terminal
\*The coil is supplied full battery voltage during cranking. Hence "R" terminal on ignition switch supplies V+ to coil.

23244.jpgAlbum 23244
NOTE: all the wires indicate are colored BW (black w/white stripe)

The coil wiring does not go through the Fuse Box

Common Problems

Does your engine start when cranking but immediately die when you release the key to the ON (running) position? Then your resistor is bad or wired incorrectly. As you can see from the diagram, START of the ignition switch supplies full voltage bypassing resistor.

Late 1200

From October 1989, Sunny Truck uses electronic ignition and computerized carburetor. There is NO BALLAST RESISTOR.

Also see: EI Wiring

BW: unknown. Not needed for old carburetor (non ECU)
BR: Coil + terminal
BW: Coil + terminal
L: Coil - terminal 

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This page has been accessed 23,172 times. This page was last modified 22:13, 24 February 2018. Content is available under Datsun 1200 Club.