Jayco Designer 27 RKS, Owner'S Manual

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The interior lights will operate from the convertor and/or auxiliary battery. Some lights
will have wall switches and other lights have switches in the lights themselves.
The RV battery is installed in parallel circuitry with the battery on your tow vehicle.
Both batteries supply power to your RV, so it is important not to discharge the tow
vehicle battery below the level of power required to start the engine. To prevent this
occurrence while parked, you should disconnect the wiring harness between the RV and
tow vehicle or install a battery isolator (see below). When the engine is operating with
the RV connected, the vehicle’s charging system will charge both the vehicle battery and
the auxiliary battery.
BATTERY ISOLATOR (For Tow Vehicle)
A battery isolator should be installed for two purposes. First it receives current from the
alternator and controls distribution of energy to both batteries. Secondly, it serves as a
check valve to prevent energy from being drawn from tow vehicle chassis battery. Energy
in the tow vehicle is now preserved to start your engine.
Two types of isolators are available, mechanical and solid state. Each type has an
amperage rating (70-amp per side) to indicate it’s capacity of operation. The solid state
type of isolator, although typically more expensive, will provide the best overall
performance. Your dealer can assist you with purchase and installation.
EXTERIOR LIGHTS
All exterior lights are energized by the tow vehicle power, such as tail lights, clearance
lights, turn signals, brake lights, etc. When attaching wire leads to a tow vehicle, carefully
and tightly tape all connections for moisture protection.
Refer to diagram (Fig. 4-27) for the color code of the seven wire harness and connector.
The connector between the tow vehicle and your travel trailer may build up corrosion
with extended use, and should be cleaned periodically to insure good electrical contact.
Fig. 4-27
White . . . . . 1 . . . . . . Ground
Blue . . . . . . 2 . . . . . . Brakes
Green . . . . 3 . . . . . . Running Lights
Black . . . . . 4 . . . . . . Interior 12-volt Lighting
Red . . . . . . 5 . . . . . . Stop & Left Turn
Brown . . . . 6 . . . . . . Stop & Right Turn
Yellow . . . . 7 . . . . . . Back Up
PORCH LIGHT
Any porch light on either sidewall will have switches located on the wall inside of the
entrance door.
Front convenience lights on Fifth-Wheel Travel Trailers or Conventional Travel Trailers
will have a switch included with the light assembly and fused through the fuse panel.
Television Cable
The television cable is rated RG-6 to accept satellite dishes.