Cummins/Onan — Remote Control Wiring Methods
Installation
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAJ, Cummins/Onan HDKAK
Before you start
- EXHAUST GAS IS DEADLY! Seal all wiring openings into the vehicle interior to keep out exhaust gas.
Procedure
- Remove the AC terminal access cover and remove one of the control wiring knockouts.
- Pull out the remote control connector plug, fit the bushing around the connector leads into the knockout slot and secure the access cover.
- Snap the connector plug and harness receptacle together.
- If the harness does not have a plug, use solder-type butt connectors and heat-shrink insulation tubing to connect to the wiring from the remote panel. Use insulated 18 AWG copper conductors.
- Keep control leads away from AC power leads to reduce erratic operation due to induced signals.
- Seal the hole where the leads enter the interior of the vehicle to keep out exhaust gas. Use silicone rubber or equivalent sealant.
- Use a two-pole, momentary-contact, center-return/center-off control switch with an indicator light.
- The total load connected to P8-F (Switched B+) should not exceed 2 amp.
- The total load connected to P8-B (Status Light) should not exceed 2 amp.
Specs & values
- Remote panel wiring: insulated 18 AWG copper conductors
- Maximum load P8-F (Switched B+): 2 amp
- Maximum load P8-B (Status Light): 2 amp
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.