2008 Fortwo SRS code B1 053

Last week the SRS light came on in my Smart. Scanned it and got code B1 053. High resistance in the right squib circuit. When I got this car the P/O had a high power stereo installed. A real hack job. Lots of stuff under the passenger seat. I pulled all that stuff out and all seemed OK. So my first thought was to check all the connections and wiring in the area. After disconnecting the battery, I pulled the passenger seat. All connectors looked fine as did the actual wires. I took a gamble and ordered a seat belt retractor from a junkyard. $75.00 and free shipping. Just put it in, cleared the code and all seem OK.