A tachometer needs a clean signal from the ignition to read accurately, and a spliced feed is a common cause of a needle that wanders. This harness supplies that circuit with correct connectors and wire.

American Autowire FB03708 Specifications:

• Application: 1970 Pontiac Firebird.
• Dash Mounted Tachometer.
• Correct wire colors and factory style terminals for straightforward circuit tracing.
• Sold individually.