electrical mods to the oka

8/2/2019 Electrical Mods to the Oka

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Being an electronics engineer it was inevitable that I would make and

installed lots of electrical/electronic modifications and additions to our

Oka.

None of these mods affect the basic functionality of the Oka, in fact

there is only one essential electrical item which keeps the engine running

or not, which is the fuel cut off solenoid on the injector pump.

As long as you can start the engine, the solenoid wire with 12v applied is

the only electrical thing needed to keep it running. See this post for the

minimum electrics to start and keep the engine running.

Electrical Mods to our Oka (** indicates my own design/construction)

Mods which relate to Driving

Smart alternator regulator for our 120A alternator (Sterling

AR12VD)

Triple batteries with automatic charge connection and manual par-

alleling switches**

Supercharge GoldMF95D31R(760 CCA)starter battery 2 x SuperchargeMRV70 (105 AH, 760 CCA)Allrounder

(Starting and Deep Cycle) house batteries

Solar panels (200W, 10 x 20W) and multiple battery charge con-

troller**

Charge monitoring display system (current and voltage)*

Start Lock Out system**

Prevents the engine from being started until an enable button

is pressed, after the ignition is turned on

Fitted with an emergency engine stop button Reversing and forward facing (for seeing over crests) cameras and

9 inch LCD display

Wiper delay system**

6 delay periods

1 or 2 wipes per cycle
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Dashboard electronics**

Voltage and charge current meters switchable to each battery

(LCD and LED)

GPS PSU

Turbo Timer

Headlight/Step/Vent/Pump "Left On" reminder system

Laptop PSU for moving map system**

Remote central locking doors**

Fitted to all 3 doors, with interlocks so that any internal door

handle can lock and unlock all doors**

Electric windows on both front doors**

Remote switching of fridge dc**

Allows fridge to be switched off from cabin when stopped(eg for fuel), to reduce battery load. Normally the fridge runs

from 240v ac via the inverter while travelling as it's more ef-

ficient than dc, less cable losses. Solar panels provide power

when the alternator is not charging

Automatic inhibit of Water Pumps**

Inhibits pumps when the ignition is ON, to prevent accidental

pumping out of water if a pipe leaks or breaks while travel-

ling Diesel Transfer Pump to transfer fuel from rear to side tank

Mods which relate to the Motorhome

System switch functions for all rear electrical equipment**

Pumps, Lights, Fans

Water Level Meters for both main water tanks**

Fridge/freezer monitor and alarm system**

Display of fridge and freezer temps

Over temp and flame failure alarms Indication of energy source (ac, dc or gas)

Note: Fridge is normally powered from ac inverterwhile travelling

Fridge Fan to circulate cold air, stops when door is opened**

Fridge LED Lights which operate when door is opened**


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External LED camping lights

Internal LED lights

Automatic porch/step lights (comes on at dusk when door is

opened)

Fridge dc low voltage cut off** Roof Vent fan speed control**

Evaporative air conditioning controls**

Controls small evaporative a/c for use when the engine is off

Provides automatic shots of water to keep the evaporator

pads damp instead of a continuous supply, to save water.

Uses a timer to control a solenoid valve from the pressurised

water supply

electrical mods to the oka

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