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Tech TipsBackup Camera GPS InputMost if not all of us that have a backup camera use it to keep an eye on the towed vehicle while driving. But, I thought it would be neat if I could route my laptop GPS screen to the backup camera via the AUX 2 input. I have a Voyager backup camera by ASA and sent them an email to see if this could be done. The answer was yes, if the output was a NTSC signal (TV). They had an adapter for $10.99. My laptop has an S Video out so I searched the Internet and found a 12' S Video to RCA cable. Put the 2 together and you have complete cable. Well, you actually need a 2:1 audio cable as the backup camera is Mono and the laptop audio is stereo. Note - ASA Electronics is part of Jensen. The cable can be found at Jensen RV Direct and click on Observation. Patch Cables
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![]() Now all I needed to do was hook the cables to the backup camera and the laptop. Back Camera
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![]() Last but not least is to configure the laptop to show the GPS screen. I have Windows XP with an ATI Radeon video chipset. XP supports dual monitors so I tried that first and was able to get the desktop to display on the backup camera. But, that does not display the GPS application. If you use the ATI interface you "Clone" the desktop per si. This allows the application to be viewed. The only down side is that you must set this up each time you use the system. As far as the audio goes, you can plug the audio cable into the speaker port and get the audio from the back cameras speaker. It’s not really usable when you consider the background noise when driving. Also, it shuts of the laptop speakers. Lastly the display only supports 640x480 and it is not the sharpest resolution. GPS Display
![]() The bottom line is.... It does what I want it to. I can see the map and next turn info while my wife watches the main screen on the laptop. TST TPMSMost, if not all of us RVer's check the tire pressures before each trip and some of us check the tire temps when we stop for fuel or at a rest stop. But, once you get on the road you never know what the pressure is or the temperature of the tires while you are on the road. So, what is the answer? Add a TPMS (Tire Pressure Monitoring System). There are any number of systems out there such as Doran Pressure Pro, Hawkshead, Hopkins, TST (Truck Systems Technologies) and maybe a few others. I settled on the TST TPMS system as it is small, easy to install, easy to configure and priced right. What's In The Box
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![]() Installing the sensors is a snap. TST provides a tool (anti theft device) to screw them to the valve stem. It is recommended that you have STEEL valve stems installed. Each sensor has a code attached to it so the display unit displays the correct info for each tire. I used a paint pen (Wal Mart Hobby/Crafts) to write the wheel position and id code just incase the paper one comes off or you have to remove the sensors. I labeled mine as follows:
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![]() The display needs to be configured for each sensor and the you need to set the various parameters such a high/low tire pressure, temp F°/C°, high/low temp etc. I found that my tire gauge was off by about 2 lbs. You will also lose a little air pressure installing/removing the sensor. Display Install
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![]() J72 Autopark Brake Light SwitchI received the following Email fro a Beau Endres about how he fixed an Autopark Problem with help from Roger Hagg (oldusedbear). Dale, When I was returning from the James Island Rally I noticed that I had a red light on the dash board that was not there when we started out. The light was “Auto Brake”. This was kind of weird as the motor home was operating normally. Once I got home the fun began trying to figure out what was wrong. Reviewing the information I had gotten from Roger Haag previously it appeared the “light switch” was the culprit. I sent an e mail to Roger and his reply confirmed my guess. The information below is what I sent to him. This is for your information if questioned. I have since gotten a “rotten green switch” for stock. If one went the other might be close behind. CarQuest found it for me, but had to go to their local GM dealer for it and it was $62.00. A price for insurance. Beau
Rodger, Today the weather cleared and I got under the motor home and to my surprise I had an oil leak. The oil was from the brake unit and had me concerned that a hose or fitting might have broken. Once I got the cover plate down it showed only the light switch that was leaking, relief.
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![]() The switch was easy to access and removing the wire connector was easy, but it had held back quite a bit of oil. I removed the old switch and held my finger over the opening, read the part number in the gray plastic area. Doubled checked your number and put it back in place, temporarily. I called my local Car Quest and gave them the number off the switch, they crossed referenced to their system and had one in stock. For future reference the Car Quest part number is 53-47307, switch, interrupter. They told me used on power steering systems. List $42.00, net $ 25.00 I picked it up and got back under the unit. I had to spay electrical cleaner on the wire connector to get the old oil
out. Then removed the old switch and installed the new switch. I connected the wire and crawled out to test the installation. Everything worked as designed and I then went back under and installed the cover plate. I added a small amount of fluid to refill the reservoir. All in all, the job went easier then I had first thought. Please accept my sincere thanks for your help, with out your guidance I would have been fumbling around with this repair, you made me a very happy camper. Sincerely R&R Cooling FanMost of us that have the dual cooling fans don't worry about them much. But, they do fail from time to time. Of course you can get a new one from Workhorse or from Evans Tempcon, if you can find a dealer that has one in stock. But, you can also get a replacement from the local autoparts store. I got the following from Jim Synder on how he repaired his failed fan. The parts needed to fix/repair the fan assmembly are:
Remove the fan blade and motor, due to the shroud mounts being a little different I used the original shroud and fan blade, though the blade is the same as the OEM part. Remove the electric plug and rewire to new fan motor (they are the same color blue/brown as OEM.) By using the stock shroud, just reinstall and plug in connector. It works perfect and is about $110.00 cheaper than quoted by dealers, plus they stock these units at their stores Jim Snyder 66mm to 73mm Brake Caliper Conversion
This write-up was orginally posted on IRV2.com and is posted here with permission from Glenn.
Here is a short tutorial on how to PERMANENTLY fix your Workhorse Re-Called Bosch 66mm Pin Slide Brakes on W-20 Thru W-22 Chassis: CHANGE THEM TO THE 73mm Bosch Pin Slide Calipers and Pads. The 73mm Calipers have NEVER had a recall, they are used on all Navistar (IHC) School bus Chassis over 26000 Lbs GVWR with Hydralic brakes -1998 thru Current Production; For those of you that have parked your rig because you are AFRAID to drive it - THIS IS YOUR FIX so you can get back on the road and FORGET ABOUT THE WORKHORSE RECALL FOREVER!! What you need:
Total parts cost (excluding Brake Fluid) = $820 I do my own labor, so if you have a shop do it, you will have to add the shop's labor cost to the $820. Notes:
![]() Read the "BOSCH Brakes - Pin SLIDE MANUAL" before you start this change. The file can be downlaoded by clicking on the above link. It contains all the necessary info for this change-out as well as all the bolt torque specifications and procedures. It is imperative that you read and understand it before doing the change-out. The maual page #46 gives all the different specifications for both the 66mm & 73mm Calipers - Please note the fluid capacity of the 73mm calipers is almost DOUBLE the 66mm capacity. Also note the exploded view of the calipers (fig.1, page 2) shows the installation of a SPLASH SHIELD, I did NOT have splash shields on my front brakes, but did have them on the rears. The instructions say the splash shields and ABS sensor brackets have to be installed on the opposite side of the anchor plate for the 73mm Calipers - I did NOT have to change my ABS brackets or the rear splash shields to accommodate the 73mm calipers. The Upper most Caliper Bolt on the rears was very close to my leaf springs when un-screwing it, but it did clear without having to remove the anchor plate or leaf spring U bolts to drop the axle for clearance. I had to use a 18mm boxed end wrench instead of a socket due to clearance, but it was not a problem. I have attached some photos of my rigs' front brake change-out and the rears are pretty much the same. My Chassis is a 2004 W-20 with 22.5 wheels built August 2003. This change-out works with both the 19.5" and 22.5" wheels. Your ABS system is unaffected by the change-out and will operate as it always has. Enjoy your new "FERRARI",,,errr I mean "WORKHORSE" brakes. The 1st. photo is my original 66mm calipers, all the rest are the installation of the 73mm calipers and tie-bars. BEFORE
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![]() 73mm - 66mm Caliper Differences
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![]() 73mm Caliper Label
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73mm Tie Bar Label
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