1st Gen Cummins Heater Controls | Turning up the Heat 🔥

[@jayg479]

I have a 90, 91, 92, and 93 all 12v single cab. I’m getting ready to restore the 90 and enjoy/learn from this channel. Thank you

[@decentgarage]

Nice! You've got a fleet!

[@decentgarage]

Always love it when a plan comes together. I could not have fixed this issue without the help of my Subscribers! 🙏

[@erwin643]

Thanks for covering this. Myself, I currently don't have maximum fan setting with that Climate Control Unit of my 1990 Dodge. Since it's a different part of the fan circuit, I'm going to try to repair the switch itself, since if I play with it, I can get it to work, a little. If I have to pull the unit, HOPEFULLY I won't have to pull the stereo: It's the newer generation of digital-only stereos - no DVD drive, etc., and only sticks into the dash about two inches.

[@brianbuell8464]

GREAT content as always! I have learned more about my old Dodge watching your channel than I have the last 4 years of owning it. Keep recording EVERYTHING you do to them. Even beginner level stuff like brake pads, spark plug wires, etc. Selfishly, what about a BB hood and cowl swap? I have a MINT one sitting in the garage that I have not mustered up the courage to tackle yet. lol

[@decentgarage]

Haha, bird bath hoods are sweet. I haven't done one yet but I am pretty familiar with how to do it.

[@trevorlee2484]

Glad I could help contribute to your channel!

[@decentgarage]

Seriously can't thank you enough. I feel horrible that you went through the work of pulling that booster. Next time I'm in Logan lunch is on me 👍

[@trevorlee2484]

@@decentgarage I'm not worried about pulling it. Now you'll have an extra one hanging around in case you need it. I want to see this stuff get put to good use.

[@2435rats]

Most of the time when these trucks have this problem is from the vacuum line junction. The rubber rectangular piece under the dash where all the lines plug into and out of. They dry rot and come apart. Look for that piece. I have had this problem and have had to swap and or join the lines together directly

[@thorvallie1495]

Thanks for the video. It really helped me troubleshoot my 91.

[@decentgarage]

Glad it helped

[@roberthenrydavis8304]

Thanks! That was a tremendous help! for my 1987 Ram W-150 Diesel. Same problem...

[@NVSRides]

Thought I would stop in and say hi. KZbin removed your comment you left on my channel. Look forward to more videos.

[@decentgarage]

Shoot! I wonder why it removed it. If you have any questions about your truck just let me know. Thanks for coming over 👍

[@bwneff]

Hey, Tim great video! I just replaced my control and everything works now, Thanks for another great video. let me know if you ever do a video on how to replace the heater box

[@decentgarage]

I don't plan on doing a video on that unless I absolute have to. There is a great write up on cummins forum on how to do it without removing the dash. It has great pictures and step by step explanations. Just take you time and go step by step

[@gusocon319]

Tim: You are the very best.

[@decentgarage]

Thanks!

[@aaronhoughtaling6829]

Would you have a part number for the light bulb on the heater control/hvac back light? My truck just has a hole in the back where a light would go. Not sure if it’s just a twist in bulb replenishment bulb or if I should be looking for a wire and light behind the dash like the 4wd indicator light.

[@jbforu2]

much appreciated video !!........going through this same scenario on an 89 d350....keep up the great trouble shooting/project resource site !

[@decentgarage]

Thanks, will do!

[@jacobenge3249]

@decentgarage you should do a video of replacing the door seals on that red first gen

[@decentgarage]

I will be doing that eventually.

[@markroybal8958]

Hey man your videos are of immense tips for me and my W350 automatic first gen, that being said do you know of any transmission kick down cable for sale there in Utah? I’m in Denver Co. any reply would be greatly appreciated! Thanks again for the great videos!

[@decentgarage]

Hey mark, i just saw your post on Facebook from your gfs acct. O don't k ow of any off hand but could ask around. You should join. The 1st gen cummins (89-93) group o. Facebook. It's the best group with over 50k members.

[@jacksonmorgan7510]

I noticed that you have two keys on your key ring. One is for unlocking and locking the doors and one is for actually starting the truck, if I am correct. Is this the same for your truck. My black key won’t start my truck, I have to use the other one. And the other key won’t unlock my doors. It seems that your setup might be opposite though. Just curious.

[@decentgarage]

I actually am not sure haha. I figured they were both ignition keys. I check that out this week.

[@kellymichael7362]

Sounds like the ignition key assy on the column was replaced. It comes with new keys when you buy it. I've already had to replace mine twice. Short of having the new assy keyed at a locksmith, you'll have different keys for the truck. One to start it and one for the doors.

[@justinyates3415]

Under neath the glove box is a small yellow wire where does that go? Seen yours went from one part of the wiring harness towards the left side of the glove box into a plug near the right side. What does yellow wire do?

[@danielmerritt5820]

Do you know what the piece coming through the firewall that you connected the vacuum lines to is called or know where to find one?

[@davewhipple4815]

What were the two sensors on the intake manifold where you were working on the brake booster? One was unplugged?

[@decentgarage]

I haven't looked too much in to that but I know the motor is a 97 and the wiring harness is a 92 so I think it may have to do with that. I'll check it out more in depth at some point 🤣

[@davewhipple4815]

I've got this issue with my truck not idling until it warms up? 91.5 intercooled...I have the same sensors , I've replaced all of them... Runs fine when warm? Weird!

[@garrettjohnson3673]

Tim I’ve been watching your videos recently….I have a standard cab I’ve been looking for those seats for…..I have a set of leather shoulder belt 1998 seats. Shoulder belt, manual w/seat heat (Road comfort) not sure if you’re interested in them or not…

[@decentgarage]

Oh boy, what color?!

[@tobylou8]

I remember using this vid when my unit broke. Now I have a problem with the resistor. I have a replacement but the screws only turn and won't come out. Any suggestions? I'm all ears! Thanks!

[@Valve-sb7ne]

I like the style of that decent garage hat!

[@decentgarage]

Thanks for the feedback 🤔. Merch launch in 2021?

[@Valve-sb7ne]

@@decentgarage that’d be cool, I would buy it!

[@decentgarage]

Stand by. It's in the works. Sometime in the first half of 2021.

[@drifterman2406]

Need a video of the dash carpet install

[@tomunverzagt5271]

Thank you for what you are doing

[@mobious4324]

Hey Decent Garage, great video! I'm wondering if the HVAC control center routing is the same for an 86 Ramcharger?? I'm having a similar issue and I believe this video helps!

[@decentgarage]

I'm not sure if the pre 89 ones are vacuum actuated or if it is all mechanical...

[@taymDodge]

Another great informational video, I like learning new things about these trucks! It is always nice to have a "control" around. Word of the day "reamed out"....🤣

[@decentgarage]

Yeah, when I was editing and heard myself use the term "control" I realized most people wouldn't know what that term meant in this context haha. And yes, the hole was reamed out 😂

[@taymDodge]

@@decentgarage well us science geeks get it! You can take the geek out of the first gen, but you can't take the first gen out of the geek! 🤓

[@decentgarage]

I had actually been working on my dissertation proposal that morning so I was in that mindset 😂. Nothing better than working in the garage instead of working on that stuff though

[@markmissildine961]

Do the 94 seats bolt in or did you have to modify it

[@decentgarage]

They are actually Durango seats. I built custom brackets for them. I have videos on how i did it.

[@48northphotography5]

Just a little off topic. I have a 93 W250 and I am searching for the Cruise Control switches. I have the exact style that are in the Prospector Bob. My Resume button no longer works. If someone has a set that they are willing to sell please comment to make arrangements. Thanks for a great video Decent.

[@decentgarage]

I'll keep an eye out!

[@2eyedjack433]

Nice fix ill have to rember that one, and a question on the seats. Are they a straight swap? Or is theres mods to make it fit?

[@decentgarage]

Not a straight swap. I just released a video on them though. Go check that out.

[@andrewneilsen1516]

Hi! Love the videos! I got a question for ya, my heater in my 90 d350 doesn’t get burning hot. Some people said maybe the heater valve? But I might try and flush out the heater core and see if that helps any. As of now my heater only gets warm and mildly hot when the engine is 100% warmed up. What do you think? Thanks man! Keep up the awesome videos!!

[@2eyedjack433]

I got the same problem with my 89. I taken out the core flushed it Booth ways until I got all the junk out. Its better but still not hot! I'm going to pull the line close to the water pump and have a look to make sure its not plugged. After that I dont have a clue.

[@decentgarage]

Andrew and 2eyed Jack, My first step would be to make sure the thermostat is in working properly. Factory cummins thermostats open at 180*. If it is stuck open you will never get the coolant temp up hot enough for the heater to really get hot. I went with a thermostat that opens at 195* because I wanted my heater to work even better when I lived in Alaska. Have you both checked your thermostats. The easiest way to check is to pull it out and literally put it in a pot of water. Heat up the water and thermostat should open when the water gets to 180*.

[@decentgarage]

2eyed jack, see my response to Andrew Neilson.

[@andrewneilsen1516]

@@decentgarage Thank you Tim. i'll try that, love the videos.

[@ronsre-creations5289]

Good Info Tim... Thumbs Up !

[@decentgarage]

Thanks again ron!

[@a-dog8075]

What are the name of the seats in the new crew cab? Want some in red too!

[@decentgarage]

2nd gen seats.

[@greeneman99710]

By chance you would not have a source for a new brake booster check valve for a 1992 W250? Believe it is part number 4485491 but not 100 percent sure.

[@sveno6167]

Very helpful video for the vacuum setup. That brake booster is original to the truck. A 97 would have hydroboost brakes.

[@decentgarage]

That's true. Hadn't thought of that.

[@ronmower3694]

I’ve got a 93 w250 only 143,700 never been turned up, all rust taking care of on body lots of new parts but need to sell could be a daily driver! 10k

[@jonathanallard7663]

So I've done everything to mine to get my controls to work, I've got a new control part, I tried messing with the vacuum line under the hood and I check the lines under the dash. No matter what I've done I still have no change. The controls are stuck on defrost/feet I just got this truck and I'm getting lost. Any tips or advice that may have not been mentioned in this video??

[@decentgarage]

Sounds like your blend door is stuck. Google 1st gen cummins blend door and your find some good info on getting it lubed up.

[@abdonmorales7361]

I have a 92 the fan doesn't work( new)I just replace the a/c compressor none of them work I check all the fuses(new ignition switch) and It's Hot Here in Texas

[@decentgarage]

Did you check the blower motor relay behind the glove box?

[@abdonmorales7361]

@@decentgarage I just order it I'll let you know if works

[@abdonmorales7361]

@@decentgarage hi again I just replace The Resistor and still nothing

[@paulandreassen9964]

Great info!

[@decentgarage]

Glad it was helpful!

[@Hemi_the_BlackSheep]

at 5:20 i am screaming "metal shavings in he booster. nooooooooooooooooooooooooooooooooooooooooooooo" fyi, a booster swap is not hard

[@decentgarage]

It all worked out 🤷‍♂️

[@Hemi_the_BlackSheep]

@@decentgarage Crossing my fingers for you. Hopefully they dont find their way into the other systems fed by vacuum. If that booster fails, One thing you may want to consider as an upgrade is the hydroboost braking system from a ~97 cummins truck.

[@TLavery707]

Anyone have some ideas of a more powerful fan. My 1991s fan pushes like no air and it takes forever for my window to defrost.

[@decentgarage]

Jim lane has a great write up on cumminsforum on putting the blower motor on a relay and it makes a huge difference. I haven't done it yet but someday I will.

[@TLavery707]

@@decentgarage awesome thank you! I'll check it out! Wiring improvements are important for these trucks.

[@Ironwind1972]

I bet your HOA loves you lol

[@decentgarage]

Luckily it's not an HOA or I would be screwed 😂

[@Ironwind1972]

@@decentgarage lol I was thinking the same. Looks like a great neighborhood.

[@rippinbiggin5886]

Man those mountains are so pretty they look fake

[@decentgarage]

It doesn't get old seeing them everyday