200409 EHC Function Update . doc     Page 1 of 1 · compact design is easily hidden on custom motorcycles · performs all fuse, relay, and signal canceling functions in one simple package · reduces size, weight, and overall complexity of the electrical system · small size of controller housing allows multiple mounting locations both visible and hidden · Allows the use of a dual - filament bulb to be used three ways: tail, brake, and turn light (excluding the need for a center brake light) . · weather resistant connections for trouble - free use in extreme environments · comprehensive installation and troubleshooting manual to minimize installation time ASM4250C obsolete effective 1/15/2004 Replaced by ASM4250D To address complications with D . O . T . regulations, Thunder Heart’s popular Electronic Harness Controller (ASM4250C) will be replaced by the ASM4250D . Whereas the “C” version of the EHC flashed the turn signals multiple times upon each application of the brake, the “D” version replaces this function with conventional brake light activation (solid “on,” without flashing the turn signals) . The ASM4250D also allows a dual - filament bulb to be used three ways: tail, brake, and turn light (which excludes the need for a center brake light) . All other features and functions of the EHCs are identical, including the price . Please update your catalogs and price sheets to reflect this change .   Trim - to - fit harness allows installation on most custom bikes