2021 Ford Ranger Pricing and Specs

The C-TEK brand has a huge reputation for performance and safety. I've personally had such a charger for more than 20 years which has been in use almost every single day of that time and still works perfectly. They're more expensive than some chargers, but the inbuilt protections against incorrect connection and overheating are worth the price, not to mention that longevity.

Some mechanics recommend connecting the two leads from the charger directly to the battery terminals, but conventional wisdom says that connecting the red cable to the positive terminal first and then the black cable to an earth somewhere in the engine bay is a better idea. This method means less chance of a spark igniting gasses emitted by the battery as it charges and discharges.

The indicator lights on the C-TEK unit will tell you when you've achieved a good connection. Using a metal part of the car for the negative attachment point works because the whole car is essentially one big negative terminal. Just make sure your attachment point isn't painted or coated with a chemical that prevents the flow of current. Or that it's not a plastic part (increasingly common these days). Many cars have a dedicated post or connection point within the engine bay.

The `smart’ alternator fitted to the Ford Ranger was designed to cap the amount of charge being fed back into the vehicle’s battery. In effect, it meant that the battery was usually charged to a lower voltage that it would have bene with a conventional alternator.

The reason for this was to extend battery life by never over-charging (and stressing) the battery, but many owners have found that the lower charge rate left them with a battery more likely to go flat when they most needed it. Many Rangers are also used for camping and therefore have a second battery fitted. That could also cause problems as the extra battery and electrical accessories often fitted to such vehicles weren’t recognised by the vehicle’s computer, leading to more low-voltage problems.

For many Ranger owners, the solution was a trip to a Ford dealer where the computer could be re-programmed to make the alternator perform in a traditional (non-smart) way and keep everything purring along. Having this performed at a dealership will not affect your warranty, but having a non-Ford technician fiddle with the charging system may not be so warranty-friendly.

I’m also informed that driving everywhere with the car’s headlights switched on causes the alternator to acknowledge the current draw and switch to a higher charging output.

With the official combined fuel consumption figure for your Ranger being 8.9 litres per 100km, having 50km of range remaining should, theoretically, suggest you have slightly less than five litres of fuel in the tank. Which further suggests you should be able to add something like 75 litres of fuel at that point. But car-makers tend to set up these warnings on remaining fuel range fairly pessimistically, giving you a bigger margin before running out. And that’s what I’d imagine is happening here. They do so because most cars will never match their official fuel number in the real world, as well as giving you a bit of lee-way in case a service station doesn’t magically appear over the next hill. The upshot is that you won’t be able to pump as much fuel into the tank as you thought it would take; that is, you had more fuel remaining in the tank than you thought.

As far as your distance per tank goes, that sounds about bang on the money to me. To get 700km from the Ranger’s 80-litre tank gives you an overall fuel consumption number of 11.4 litres per 100km which I would say is just what you should expect from this vehicle in normal use.