2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 345Get this manual

SIGNAL SYSTEM

4.Voltage

Connect the pocket tester (DC 20 V) to the horn at the "Black" terminalTester (+) lead Black lead Tester () lead Frame ground

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives