Check the engine compartment power distribution panel first and match each numbered slot with its assigned circuit using the cover legend before removing any component. High-current links near the battery supply systems like starter motor, cooling fans, and charging circuit.
Open the interior panel located on the driver side and use the printed key to trace lighting, radio, power outlets, and HVAC circuits. Each position is marked with a number and amperage value, typically ranging from 5A to 30A.
Use a multimeter or test light to confirm voltage on both terminals of each slot while the system is active. Power on one side indicates a failed internal strip, while no signal points to upstream wiring or relay issues.
Relays control high-load components such as fuel pump, ignition, and blower motor. Swapping identical units from non-critical circuits helps verify faults without removing additional parts.
07 Colorado fuse box diagram with panel layout and relay positions
Locate the engine bay power distribution unit and use the cover legend to match each numbered slot with its circuit before removing any component; high-amperage elements near the battery handle starter, alternator, and cooling systems, while mid-range positions supply lighting, control modules, and accessory circuits.
Access the interior panel on the driver side to identify lower-rated inserts for cabin systems such as radio, HVAC, and power outlets; relays positioned рядом with these circuits control fuel pump, ignition, and blower motor, and can be swapped with identical units to confirm faults without additional tools.
Engine compartment fuse panel layout with slot numbers and amperage ratings
Open the underhood power distribution panel and read the numbering printed on the cover to match each slot with its circuit before removing any component.
Positions closest to the battery feed contain high-current links rated from 40A up to 175A, supplying starter motor, alternator output, and cooling fans.
Central rows usually carry mid-range ratings between 20A and 40A, supporting systems like ABS, engine control modules, and trailer connectors.
Outer sections include lower ratings such as 5A, 10A, and 15A for sensors, relays control circuits, and signal wiring.
Each numbered slot corresponds to a legend on the cover, with abbreviations like IGN, ECM, FAN, and AUX indicating connected systems.
Check both terminals of each slot with a test light while the circuit is active; voltage on one side only points to a broken internal strip.
Replace each component with the same amperage value to prevent overheating, wiring damage, or repeated failure under normal load.