85 280SL Lambda problems

[280sleuro]

Hello, I'm new to this forum but been reading the threads for six month, great stuff. I have a 85 280SL Euro with the M110 engine. After replacing the valve stem seals and other issues I have the car running great. The problems I have are the cold start valve and the frequency valve are not getting 12 volts. During cold start, I'm only getting less than 1 volt at the cold start valve when cranking the engine. When the engine is at operating temp., I'm only getting less than 1 volt to the frequency valve. I replaced the oxygen sensor and low voltage protection relay. The oil temp switch and the thermo time switch appears to be working. Has anyone experience similar problems. I would appreciate any advice
Thanks
Jim