* Online used parts marketplaces: Websites like eBay, Craigslist, and Facebook Marketplace are your best chance of finding a used vacuum harness. Search specifically for "1988 Chrysler Fifth Avenue vacuum harness" or "1988 Chrysler Fifth Avenue vacuum lines." Be prepared to potentially purchase a harness from a parts car and transfer the lines yourself.
* Junkyards (Auto Recyclers): Check local junkyards or auto recyclers. They may have a Fifth Avenue in stock that you can pull the harness from yourself or have them do it. This is likely the most cost-effective option if you can find one.
* Specialty parts suppliers: Some companies specialize in parts for older vehicles. You may have to call around to different suppliers and inquire about availability. They may have some parts, but a full harness is less likely.
Important Note: If you can't find a complete harness, you may need to rebuild your existing one. This involves replacing individual vacuum lines, checking for leaks, and potentially replacing the vacuum reservoirs or actuators. You can find individual vacuum lines at most auto parts stores. A repair manual specific to your year and model of Chrysler Fifth Avenue will be very helpful.
Remember to be very precise when identifying your specific engine and any options that may affect the vacuum system. Different engines, and even trim levels, could have slightly different vacuum line configurations.
