Can someone direct me to the correct forum to discuss 1978 intermittent wiper troubles? I’m looking for help troubleshooting my LMC wiper delay module that has failed. Where will I find wiring diagrams showing this wiring from the switch through the harness to the original 2speed wiper motor? I...

Could someone post a link to help me test my intermittent wiper switch that I installed with the aftermarket LMC intermittent wiper control module. I’m still searching for answers to why the delay feature on these LMC modules fail. If there’s someone that can shed some light on this testing to...

Now I’m thinking about the “new” intermittent switch I added when I put the delay module in place. Until now I have only considered the modules as being faulty. Could it actually be the new switch causing my module delay feature to fail? Should I order the switch from LMC truck parts to be sure...

The reproduction part seems to duplicate the factory setup. The operation must be engineered to clone the parts that Ford built beginning around 1978. I’ve never had a factory built unit so I’m not sure what’s inside the “box” I imagine a circuit board built very much like what these new...

Thanks. When I replace the LMC part with a new one everything is great for a short time. I test it once I have it connected and wait for a chance to drive the truck in the rain. When it rains I test it again briefly before I turn it on and leave it on. I haven’t timed the operating unit to see...

Yes. It’s mounted to the circuit board in side the little black box. Similar to the OEM setup.

My conversion from the original 2 speed wipers to the upgrade intermittent wipers worked great initially. While driving in the rain the delay feature stopped working. I have checked my ground and connectors but I don’t find anything wrong there. I’ve replaced the new LMC module to get the very...

18 millimeters which is around 3/4 of on inch is the way I read it the manufacturer size charts. I understand 18 inches is out of the question. I believe an eight inch wheel with 3.75 back space and a 3/4 inch offset will work on my 1978 F150 2wd. Do you agree?

I’m in the planning stages of new custom wheels and tires on my bone stock 1978 F150. I’m looking at a set of 8 hole polished aluminum wheels. 15x8 or larger. The backspace on my original wheels is 3.5 on 15x6 OEM steel wheels. I’m asking for the correct backspace that would not have a...

I’m about to replace my Cylinder Head Temperature sensor. What’s the best practice, or method to simplify this job. Thanks in advance for you advise.

I’m wanting to replace an OEM radio with the original style that has the modern features. What is your best recommendation for quality products. I’m willing to pay as long as the product matches the price. I see a couple on some websites but would like to get honest opinions before I dive in...

Hi Fellro. I managed to get my system running again today. I put my old De-icing switch back on and played with the “kick in and kick out” adjustments. It ran fine for a while but now and then the relay would fail. I could touch it and it would work. It’s not turning the clutch off and the lines...

1978 blower motor w/factory ACI’m trying to find a schematic for the wiring on this F-150. It’s all factory wiring. Maybe it will be in my big manual. I’m going cross eyed looking at this phone trying to find the clutch circuits. I’ll get back to it tomorrow and figure out why it’s not...

1978 blower motor w/factory airFellro Where is the hi/low pressure switches located. When I look at the wiring I see the de-icing relay controls the clutch. I’ll look back at the wiring. I didn’t see the hi/lot switches and how they are connected. Thanks.

I was successful using this write up. I now have a new blower mounted from the engine compartment and a new heater core. I reconditioned the best I could. Another problem I now have is the de-icing relay is not cycling the compressor off. My dash vent temperature is down to 30 degrees. For some...