Question about 1988 Chevrolet S-10

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Interior lights and Radio wont come on

I just replaced my heater core and had to take dash off and what not then after i put everything back none of the interior would come on such as radio and lights , speedometer lights still work tho

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Sounds like ur instr control module its located bottom f the dash near the steering wheel goto theyre cheap n they should have a pic og what urs looks like so u know what ur looking 4

Posted on Apr 08, 2009


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Why is there no control radio volume?

If you didn't disconnect the battery when you did the work can be an issue You need to disconnect the battery like 10 seconds and put it back and then tried again. will work depends on the vehicle

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Change heater core

if nothing else was done to it and b4 the initial repairs it was starting fine, than it is obvios that you have mised some wires connection after putting the dash off and back on. there is all the main harnesses are located including the 1 to ECU and also wires that are going to the starter motor from your ignition lock. also you mite have an allarm or immoboliser that now have to be resset.. G/luck

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Heater core 1991 grand marquis

This may be one of those where the entire dash has to come out to do the heater core.
But you only want to replace the core if it is plugged, or leaking. There is an easy way to tell if it is plugged: with the engine at normal operating temperature, and the control valve open so coolant will circulate, now feel both heater hoses. If core is blocked, only one hose will be hot. If core is circulating correctly, both hoses will be hot. If they are, you don't need to change out the core. One of your vacuum actuated doors is the problem, the blend door that lets air from the blower motor pass over and around the heater core.

May 21, 2017 | 1991 Mercury Grand Marquis

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97 f150 4.6L I changed out the heater core in which case I had to take the interior appart. After putting everything back together and connecting the battery up the accessory relay was clicking, had...

Hope you can read that? Check the fuses for those relays, the two on the right. Not only check the fuses, use a test lite to check for voltage on the fuse circuit. Check the four fuses on the left, also, some are hot all the time, some go hot with the key on.
The top two wires at relay is the load side. The bottom two wires are on the control side of relay. The control side needs voltage and ground. Your gem module controls ground. Sometimes when battery voltage is lost, some modules may need to be reprogrammed? I don't have that info. In my opinion, clicking is either intermittent voltage or ground. Right now I'm thinking ground, controlled by the gem model. I could be wrong?
gem module-zypwybkd0qxqgfeaobqkwdfc-5-0.jpg

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How to replace the heater core on a 1985 300Z

If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

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Getting heater to work. Fan runs and it cools well. Has Climate control

15 years old, maybe your heater core is bad, no heat transfer from the coolant to the core, hence none from the core to your interior. Have it checked, usually a pain to replace as the dash has to come out to get at it.

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Look under the hood on the fire wall where the heater hoses go into the interior ogf the car. The heater core is just inside under the dash. theree is no easy way to tak out the heater core. But it is done all the time.
Do that only if it's leaking and the carpet under the dash is wet. If not, try flushing the heater core .With the engine cold and the radiator empty, Take both hoses off that connect to the heater core. Insert some hoses to both the inlet and outlet so you can direct the water down and away from the engine. With a good stream of water pressure. Put the water hose into one of the inlets. And spray the water in until it comes out the other hose. Flush out everything that may be clogging the core.

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1995 chevy blazer running lights

when i changed my radio in my blazer i discovered there were a lot of wires that ran through it like my dash lights interior lights and a bunch of other stuff you probably just missed a connector or got two of them mixed up you might have to take out the dash again

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