PACCAR 520 — How to Inspect and Replace a Fuse

EMERGENCY - How to Inspect and Replace a Fuse not available, a fuse of a lower rating may be temporarily substituted. You can also use a fuse from a circuit you can do temporarily without (for example an accessory circuit or radio). CAUTION If a circuit keeps blowing fuses, have the electrical system inspected for a short circuit or overload by an author- ized dealer as soon as possible. Fail- ure to do so could cause serious dam- age to the electrical system and/or ve- hicle. 2 CAUTION 1 Blown When replacing a failed circuit breaker, always use an approved circuit break- er with a current rating equal to or less than the circuit breaker being re- placed.

Only use the approved Type II modified reset circuit breakers. NEV- ER use a Type I (automatic reset) or Type III (manual reset) circuit breaker. A fuse with a current rating equal to or less than the circuit breaker being re- placed can also be used. CAUTION Fuse Puller Before replacing a fuse, turn OFF all lights and accessories and remove the ignition key to avoid damaging the electrical system. 1. Turn OFF all lights and accessories and remove the ignition key to avoid damaging the electrical system. 2. Determine from the chart on the fuse panel which fuse controls that component. 3. Remove that fuse and see if it is blown.

CAUTION Always close and latch the engine compartment fuse box cover. A latch- ed cover ensures a water tight seal which can prevent damage to electri- cal components. If it is blown, replace it with a fuse of the same rating. If a fuse of the same rating is Y53-6096-1C1 (09/20) 33