new f 150 ecoboost

Mine was a 2013 and did not have the instructions in the bag either. The dealer installed them when I stopped by for something else . I think the only effect is the trailer battery will not be charged without them, everything else towing wise works ok. But I may be wrong.

Mine had instructions in the bag with the relay and fuse.

3oaks wrote:

NinerBikes wrote:
Does anyone ever read the Owners Manual any more these days when they buy a vehicle? ..........................

Yes! I always read the Owners Manual from cover to cover and hi-lite the important items that are specific to the vehicle that I own. I do this with any new equipment that I purchase.

Not only do I get to learn all about the vehicle, but it saves possible head aches down the road do to ignorance from not reading the owners manual.

dockmaster, wasn't there a diagram in the same packet with the two relays? That's usually the case. But apparently yours did not. I would ask the dealer about it.

X2, when I bought my truck new, I went through the manual while I waited for the truck to be prepped, which took several hours. I knew more about the truck than the salesman who went through this truck with me before I left the dealer.

NinerBikes wrote:
Does anyone ever read the Owners Manual any more these days when they buy a vehicle? ..........................

Yes! I always read the Owners Manual from cover to cover and hi-lite the important items that are specific to the vehicle that I own. I do this with any new equipment that I purchase.

Not only do I get to learn all about the vehicle, but it saves possible head aches down the road do to ignorance from not reading the owners manual.

dockmaster, wasn't there a diagram in the same packet with the two relays? That's usually the case. But apparently yours did not. I would ask the dealer about it.

It may be buried, but the relay and fuse have been discussed on here and some F-150 forums. I've found Google's search using the "site:rv.net" works pretty well to find things.

From a quick search, the relay goes into position #9, fuse goes into position #21, and this is for a 2010 Ford F-150, so it can be different on yours.

I did read the owners manual. There is a section on light bulbs. If it had the section on fuses I would not have posted the question.
I did go on the internet and find/copy the layout for the fuses.
And solve the problem. Thank you too the people who tried to help.

On third check I did find a section on fuses, no where near the maintenance section.

Does anyone ever read the Owners Manual any more these days when they buy a vehicle?

For the OP, did you at any point consider buying the Ram EcoDiesel instead?

Read the section on fuses in the manual. Be sure to read both for the engine compartment and the interior.

Moved to Tech Issues forum from DIY.

Ask the service mgr at your dealer... I read somewhere on here that the newer F-150's need fuses or relays put inline in order to tow......