Johann I was a faithful follower of Emperor Henry IV and remained in the investiture dispute at his side.
Bishop Johann died on October 26, 1104, at the age of 41 and is registered on the day of his death with an annual memorial mass in the newer Seelbuch of Speyer Cathedral.
He was buried in the collegiate church of Sinsheim, in a tomb in front of the high altar, where his mother was laid to rest.
According to the chroniclers Philipp Simonis (1532-1587) and Wilhelm Eysengrein, he bequeathed his family's possession, the Castle of Spangenberg to the diocese of Speyer.
[2] The writer Wilhelm Hünermann used Bishop John vom Kraichgau as a literary figure in his 1941 novel The Living Light (Verlag der Buchgemeinde Bonn), about the life of St. Hildegard of Bingen.