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Jay, this is what I would do,
Disconnect all wires you connected , then connect the batteries and see if the problem is still present.
Let us know what you get. If we go back to the beginning where the present problem was not with us, we can go from there. What do you think ?
UPDATE TO UPDATE: so 2 new batteries later and EVERYTHING WORKED at least for about 300 yards. We are still blowing a fuse. Fuse 17 for exterior lights. But for a few minutes the turn signal, running light, reverse light, and license plate light problems all were gone. So im wondering if the issue could be a bad turn signal switch. We are running out of wire to check for shorts. Any helpful advice?
Keep in mind, a short doesn't have to be wire alone, it can be in a component or even an incorrect connection.
Until you disconnect all the wires you connected, we will never know where the problem is located. You reconnect them one at a time then check and you surely will find the problem. Without a plan , you are jumping around and that method takes a lot longer and maybe never find the source of the problem.
Time to bite the bullet and do what is necessary or you might plan on being there a lot longer than necessary..
I am still going on the premise the problem appeared after you made all the connections, is this correct ?
The parking light question to you remains unanswered so I will skip that until I get a reply from you.
So let's go over the turn signal first instead.
Above diagram locate K2 indicator relay.
Below diagram locate the same K2.
This is a single relay (both turn signal and hazard) with a normally closed setup type because hazard needs to function with engine off key out situation.
For turn signal to work: K2 relay needs to be energized as: terminal 85 (already always hot), terminal 86 (already grounded at all time), terminal 30 (requires key to run position), terminal 87 (gets 12v feed from terminal 30), your turn signal switch does NOT need to be turn to left or right, the 12v is already there it's up to you to toggle turn signal to left or right to activate blinker. The 12v feed from terminal 30 to terminal 87 to turn signal switch in off position and it terminated right there.
For hazard to work: K2 relay does NOT need to be energized as: terminal 85 (already always hot), terminal 86 (already grounded at all time). When the relay is NOT energized, terminal 87a is always hot, this is so-called normally closed setup. 90% or higher uses normally open setup. The hazard switch is pretty much an inline cut off switch between the relay and the blinker so your hazard can function when engine off key out.
When terminal 85 is always hot and terminal 86 is always ground, your k2 relay energizes or not, sends 12v to the multifunction switch. Look up 2nd diagram from the top you can see terminal 87 connects to terminal 2 on the switch whereas 87a connects to terminal 3.
So let's assume your brand new k2 relay is good you should get 12v at terminal 2 of the multifunction switch when key in run without toggling the turn signal switch. Please check and get back. It's circuit 44 shown below diagram and the wire is in LB (light blue). Use voltmeter and probe terminal 2, key in run, you get 12v or not.
Next step is to probe the (17) right turn and (16) left turn to find out why 16 is not working when you reply to my original parking light question.
You can also follow the pinpoint test K pdf below.
Hey Heiko, should this diagram and advices be also valid for a 2013 E-150 with exactly the same issue?
Second question: accoding to the diagram, the multifunction is sending the signal to both brake and turn signal lights. Could this be a faulty multifuntion switch issue???
thanks!!
