FD3 - Check Operation of Stoplamps

- Key On.

- Check stoplamp operation.

- Stoplamp operation:

Stoplamps operate normally. Go to FD4. FD4 - Check For BOO Circuit Cycling

Stoplamps never on. Go to FD5. FD5 - Check For Power to Brake Switch

Stoplamps always on. Go to FD6. FD6 - Verify Brake Switch Is Not Always Closed